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Nursing management of Congenital Heart Diseases in Children

Congenital Heart Disease (CHD) refers to structural abnormalities of the heart or major blood vessels that are present at birth. It is one of the most common types of birth defects and may affect the normal flow of blood through the heart and lungs. This presentation provides a clear and simple overview of Congenital Heart Disease, including its definition, classification, causes and risk factors, pathophysiology, signs and symptoms, diagnostic methods, medical and surgical management, complications, and nursing management. The presentation also discusses important congenital heart defects such as Atrial Septal Defect (ASD), Ventricular Septal Defect (VSD), Patent Ductus Arteriosus (PDA), Tetralogy of Fallot (TOF), Transposition of Great Arteries (TGA), and Tricuspid Atresia. This presentation is useful for B.Sc. Nursing, GNM, pediatric nursing students, nursing educators, and healthcare professionals for learning, teaching, and quick revision. Keywords: Congenital Heart Disease, CHD, Cyanotic Heart Disease, Acyanotic Heart Disease, Pediatric Nursing, ASD, VSD, PDA, Tetralogy of Fallot, TGA, Tricuspid Atresia, Nursing Management.

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CONGENITAL HEART DISEASES Mr. Pradeep Abothu, M.Sc (N), PhD Scholar Associate Professor, Dept. of Child Health(N) ASRAM College Of Nursing
CONTENT • Review of blood circulation • Fetal Circulation • d/f between acyanotic & cyanotic heart diseases • Acyanotic diseases 1. Patent Ductus Arteriosus (PDA) 2. Atrial Septal Defect (ASD) 3. Ventricular Septal Defect (VSD) 4. Coarctation of the Aorta (CoA) 5. Aortic Stenosis 6. Pulmonary Stenosis • Cyanotic diseases 1. Tetralogy of Fallot (TOF) 2. Transposition of the Great Arteries (TGA) 3. Tricuspid Atresia 4. Total Anomalous Pulmonary Venous Return (TAPVR) 5. Truncus Arteriosus 6. Hypoplastic Left Heart Syndrome (HLHS). • Nursing management
INTRODUCTION
Oxygenated blood from the placenta enters the fetus through the umbilical vein. The umbilical vein carries the blood to the ductus venosus, a vessel that bypasses the liver. The blood then enters the right atrium of the heart. From the right atrium, blood flows through the foramen ovale (a hole in the heart) into the left atrium. [ FETAL CIRCULATION
From the left atrium, blood enters the left ventricle and is pumped to the aorta. The aorta distributes blood to the foetus’s body, including the head, arms, and lower body. Deoxygenated blood returns to the heart through the superior and inferior vena cavae. The blood then enters the right atrium and flows through the ductus arteriosus into the aorta. The blood is then circulated to the placenta through the umbilical arteries to pick up oxygen and nutrients.
DEFINITION Congenital heart disease (CHD) refers to structural abnormalities of the heart present at birth. Some defects are simple and require no treatment, while others may necessitate surgeries over time.
INCIDENCE • The global incidence of CHD is estimated to be about 8-10 per 1,000 live births. • In India, about 2,00,000 children are born every year with CHD, resulting in a birth prevalence of 8 per 1000 live births.
ETIOLOGY • Chromosomal abnormalities (e.g., Down syndrome,Turner syndrome) • Abnormal gene mutations. • Maternal infections like rubella during pregnancy • Maternal conditions such as diabetes, phenylketonuria • Exposure to certain medications (e.g., lithium, isotretinoin) • Alcohol consumption and smoking during pregnancy • Higher risk if a sibling or parent has CHD. • Deficiency in essential nutrients such as folic acid during pregnancy
TYPES OF CONGENITAL HEART DISEASE Congenital heart diseases (CHD) can be broadly classified into two categories: 1. Acyanotic heart diseases 2. Cyanotic heart diseases.
Acyanotic Heart Diseases: In acyanotic heart diseases, the oxygenated blood from the left side of the heart mixes with deoxygenated blood in the right side (left-to-right shunt) and does not cause significant cyanosis. Common Acyanotic Heart Diseases include: 1. Atrial Septal Defect (ASD) 2. Ventricular Septal Defect (VSD) 3. Patent Ductus Arteriosus (PDA) 4. Aortic Stenosis 5. Pulmonary Stenosis 6. Coarctation of the Aorta (CoA)
Cyanotic Heart Diseases: Cyanotic heart diseases are characterized by a right-to-left shunt, which causes deoxygenated blood from the right side mixes with oxygenated blood in the left side, leading to cyanosis. Common Cyanotic Heart Diseases include: 1. Tetralogy of Fallot (TOF) 2. Transposition of the Great Arteries (TGA) 3. Tricuspid Atresia 4. Total Anomalous PulmonaryVenous Return (TAPVR) 5. Truncus Arteriosus 6. Hypoplastic Left Heart Syndrome (HLHS).
DIFFERENCES BETWEEN ACYANOTIC AND CYANOTIC HEART DISEASES Feature Acyanotic Heart Diseases Cyanotic Heart Diseases Shunt Direction Left-to-right Right-to-left Color of Skin Normal (no cyanosis) Cyanosis (bluish discoloration) Oxygen Saturation Normal or slightly decreased Significantly decreased Symptoms Often asymptomatic or mild symptoms such as fatigue, shortness of breath, and heart murmurs. Severe symptoms including cyanosis, difficulty breathing, poor feeding, clubbing of fingers and toes, and squatting. Examples ASD,VSD, PDA,AS, PS, CoA TOF,TGA,Tricuspid Atresia, TAPVR,Truncus Arteriosus, HLHS
ACYANOTIC HEART DISEASES
PATENT DUCTOUS ARTERIOSUS Mr. Pradeep Abothu, M.Sc (N), PhD Scholar Associate Professor, Dept. of Child Health(N) ASRAM College Of Nursing
DEFINITION A patent ductus arteriosus is a congenital heart defect where the ductus arteriosus, a blood vessel that connects the pulmonary artery to the aorta during fetal life, fails to close after birth. This results in abnormal blood flow between the aorta and the pulmonary artery, causing oxygenated blood to mix with deoxygenated blood.
INCIDENCE • PDA occurs in about 1 in 2,000 full-term live births. • Significantly higher incidence in premature infants, especially before 28 weeks’ gestation (30-50%). • More common in females, with a male-to-female ratio of 1:2.
PATHOPHYSIOLOGY In patent ductus arteriosus (PDA), the ductus arteriosus remains open after birth, allowing blood to flow abnormally between the aorta and the pulmonary artery. This creates a left-to-right shunt, increasing blood flow to the lungs and placing extra workload on the left side of the heart. Over time, this can lead to pulmonary congestion, heart enlargement, and eventually heart failure.
CLINICAL FEATURES • Small PDAs in term infants are asymptomatic. Large PDAs & pre term infants are symptomatic. Symptoms include • A continuous "machinery" murmur heard at the left upper sternal border. • Respiratory Distress • Poor Feeding • Sweating • Fatigue • Tachycardia • Bounding Pulses • Cyanosis
DIAGNOSTICTOOLS • Physical Examination: On auscultation a continuous, machinery-like murmur over the left upper chest can be heard. • Chest X-ray: Reveals an enlarged heart and evidence of increased blood flow to the lungs. • Electrocardiogram (ECG): Records the heart’s electrical activity, detecting irregular rhythms and identifying an enlarged heart. • Echocardiogram: Confirms the diagnosis by showing abnormal blood flow and assessing the size of the heart.
MEDICAL MANAGEMENT • Patent ductus arteriosus (PDA) can often be managed medically, especially in premature infants. Nonsteroidal anti-inflammatory drugs (NSAIDs) like indomethacin are commonly used to encourage the closure of the ductus arteriosus. • The typical dosage of indomethacin is 0.2 mg/kg initially, followed by two additional doses of 0.1-0.25 mg/kg at 12 to 24-hour intervals, depending on the infant's gestational age and response to the medication. • Diuretics may be prescribed to manage symptoms of heart failure by reducing fluid overload. Additionally, fluid restriction helps to prevent fluid overload.
SURGICAL MANAGEMENT • When medical management is insufficient, surgical options are considered. Percutaneous catheterization is a minimally invasive procedure where the ductus can be closed using a spring coil introduced with a heart catheter. • With some larger PDAs a ‘Device’ may be employed. • If catheter-based methods are not feasible, surgical ligation through open surgery can be performed. This procedure is often performed through a lateral thoracotomy, where the ductus is either tied off with sutures or completely ligated and divided.
ATRIAL SEPTAL DEFECT (ASD) Mr. Pradeep Abothu, M.Sc (N), PhD Scholar Associate Professor, Dept. of Child Health(N) ASRAM College Of Nursing
DEFINITION An atrial septal defect (ASD) is an abnormal opening between the right and left atria, causing blood to flow from the left atrium to the right atrium. (left to right shunting of blood)
INCIDENCE • Atrial septal defect (ASD) occurs in approximately 1 in 1,500 live births and accounts for about 10% of all congenital heart diseases. • It is more frequently diagnosed in females than in males, with a ratio of about 2:1.
TYPES OF ASD Atrial septal defects can be classified into three types. • Ostium Secundum ASD: The most common type, accounting for about 70% of all ASD’s. It is located in the middle of the atrial septum, within the region of the fossa ovalis. • Ostium Primum ASD: Accounts for about 15-20% of ASD’s. It is located lower in the atrial septum, near the atrioventricular valves. • Sinus Venosus ASD: Represents about 5-10% of ASDs. It is located near the entry of the superior vena cava or, less commonly, the inferior vena cava.
PATHOPHYSIOLOGY Presence of ASD Blood flows from the left atrium to the right atrium Increased Lung Blood Flow through pulmonary arteries Right Heart Enlargement from extra blood flow. Pulmonary Hypertension due to increased lung blood flow Arrhythmias [ Shortness of breath, fatigue, and heart failure.
CLINICAL FEATURES • ASDs can range from small to large. Smaller defects may close on their own and are often asymptomatic, with many children showing no symptoms and appearing healthy. • Large or symptomatic ASDs may present the following symptoms: Fatigue Tachypnea Shortness of breath Poor growth Arrhythmias Frequent respiratory infections
DIAGNOSTICTOOLS • Physical Examination to detect heart murmur suggesting ASD. • Electrocardiogram (ECG) to reveal arrhythmias. • Chest X-ray to show heart enlargement and increased lung blood flow. • Cardiac MRI/2D Echo to identify the location and size of ASD.
Management of atrial septal defects depends on the size of the defect, the presence of symptoms, and the risk of complications. Small ASDs are mostly asymptomatic and require no intervention. • Keep the heartbeat regular with medications like beta blockers such as Lopressor and Inderal, and digoxin (Lanoxin). • Anticoagulants, such as warfarin (Coumadin) and anti-platelet agents like aspirin, are used to reduce the risk of blood clots and strokes. • Infection is controlled with antibiotics. MEDICAL MANAGEMENT
• Timing and Indications: Surgical correction for ASDs that significantly affect blood flow is generally recommended between the ages of 2 and 4. If the child exhibits symptoms earlier, surgery may be performed sooner. • Cardiac Catheterization: This minimally invasive method involves using a catheter to place a closure device over the ASD, making it suitable for many Secundum ASDs. SURGICAL MANAGEMENT
Surgical Approach: The most common surgical method involves a median sternotomy and requires cardiopulmonary bypass. Small Defects: These are typically closed using a purse-string technique, which involves stitching around the opening and pulling it tight to close the defect. Large Defects: For larger defects, a knitted Dacron patch is sewn over the opening to effectively seal it.
VENTRICULAR SEPTAL DEFECT (ASD) Mr. Pradeep Abothu, M.Sc (N), PhD Scholar Associate Professor, Dept. of Child Health(N) ASRAM College Of Nursing
DEFINITION A ventricular septal defect (VSD) is an abnormal opening between the right and left ventricles, causing blood to flow from the left ventricle to the right ventricle (left to right shunting of blood).
INCIDENCE • The incidence of ventricular septal defect (VSD) is approximately 1 in 500 live births. • VSD is one of the most common congenital heart defects, accounting for about 20- 30% of all congenital heart anomalies.
TYPES OFVSD • Membranous VSD: An opening in the upper section of the ventricular septum near the valves. It is commonly operated on as it rarely closes spontaneously. • Muscular VSD: An opening in the muscular portion of the lower ventricular septum. It is the most common type and often closes spontaneously without requiring surgery. • Atrioventricular Canal Type VSD: A VSD associated with an atrioventricular canal defect, located beneath the tricuspid and mitral valves. • Conal Septal VSD: The rarest type of VSD, occurring in the ventricular septum just below the pulmonary valve.
PATHOPHYSIOLOGY Oxygenated blood from the left ventricle is shunted to the right ventricle through the abnormal opening. The shunted blood returns to the pulmonary circulation from the right ventricle. Left Ventricular Overload due to increased workload Right Ventricular Hypertrophy due to Increased blood flow in the right ventricle left ventricular hypertrophy Heart failure [
CLINICAL FEATURES The clinical features ofVSD depend on the size of the defect. • Harsh Loud Murmur • Dyspnea • Tachypnea • Exercise Intolerance • Delayed Growth • Feeding Difficulty • Recurrent RI • Cardiomegaly • Mild Cyanosis, Clubbing Of Fingers • RV Hypertrophy
DIAGNOSTICTOOLS • Physical Examination: Detects abnormal heart sounds (murmur), at the lower left sternal border. • Electrocardiogram (ECG): Normal in small VSDs; shows right ventricular hypertrophy in moderate to largeVSDs. • Echocardiogram: 2D Echo and color Doppler to determine the size and location of theVSD and assess the degree of shunting. • Chest X-ray: Shows enlarged heart and increased pulmonary vascular markings in moderate to largeVSDs.
• Infants with Small VSDs do not require surgery and may close before 1-2 years of age, but antibiotics are prescribed to prevent endocarditis. • Infants with moderate to Large VSDs who show symptoms of congestive heart failure and poor growth are managed with a combination of Digoxin and diuretics. • Medical management also involves treating repeated respiratory infections, anemia, and controlling congestive heart failure, along with preventing infective endocarditis. • If medical management fails and the infant continues to show signs of congestive heart failure, early surgical repair is indicated. MEDICAL MANAGEMENT
• Surgical repair of ventricular septal defects (VSDs) involves an open-heart procedure. • Moderate to small VSDs are closed with purse string sutures, while large defects are patched with synthetic Dacron. • In some cases, pulmonary artery banding may be used for large or multipleVSDs. SURGICAL MANAGEMENT
COARCTATION OF AORTA Mr. Pradeep Abothu, M.Sc (N), PhD Scholar Associate Professor, Dept. of Child Health(N) ASRAM College Of Nursing
DEFINITION Coarctation of the aorta is a congenital narrowing of the aorta, typically at the juxtaductal position, just distal to the origin of the left subclavian artery.
INCIDENCE • The incidence of coarctation of the aorta is approximately 1 in 2,500 live births. • It accounts for 5-8% of all congenital heart defects and is more common in males.
TYPES • Postductal or Adult Coarctation: Occurs distal to the ductus arteriosus and may remain asymptomatic until later in life. • Preductal or Infantile Coarctation: Occurs proximal to the ductus arteriosus and often presents in infancy with severe symptoms.
PATHOPHYSIOLOGY Coarctation of the aorta leads to a significant narrowing at the juxtaductal position, causing increased resistance to blood flow. This results in increased blood pressure in the upper body and reduced pressure to the lower body. Collateral circulation develops to bypass the constricted area, but this can result in complications such as heart failure or aortic rupture. The heart compensates by increasing left ventricular workload, leading to left ventricular hypertrophy. [
CLINICAL FEATURES The clinical presentation varies based on the severity of the coarctation and the presence of other defects. • Mild to Moderate Coarctation: Hypertension in the upper extremities, weak or delayed pulses in the lower extremities, and a systolic murmur heard best over the back. • Severe Coarctation: Signs of congestive heart failure, including tachypnea, poor feeding, and failure to thrive in infants; claudication, headache, and epistaxis in older children.
DIAGNOSTICTOOLS • Physical Examination: Reveals a systolic murmur, higher blood pressure in the arms compared to the legs, and weak femoral pulses. • Electrocardiogram (ECG): May show left ventricular hypertrophy. • Echocardiogram: Confirms the diagnosis by visualizing the narrowing of the aorta and assessing its severity. • Chest X-ray: May show rib notching due to collateral circulation and cardiomegaly.
• Infants with significant coarctation are initially managed with prostaglandin E1 to keep the ductus arteriosus open, improving blood flow. • Antihypertensive medications such as beta-blockers or ACE inhibitors may be used to manage hypertension in older children and adults. • Monitoring for complications such as heart failure or aortic rupture is essential. MEDICAL MANAGEMENT
• End-to-End Anastomosis: In this procedure, the narrowed segment of the aorta is removed, and the healthy ends are sutured together. • Subclavian Flap Aortoplasty: In this technique, a portion of the left subclavian artery is used to patch the narrowed aorta. • Patch Aortoplasty: In this technique, a synthetic or biological patch is sewn into the aorta to widen the narrowed area. • Balloon Angioplasty: In this procedure, a balloon is inflated at the narrowing site to widen the aorta, sometimes followed by stent placement. SURGICAL MANAGEMENT Resection/End-End Subclavian Flap Balloon Angioplasty
AORTIC STENOSIS Mr. Pradeep Abothu, M.Sc (N), PhD Scholar Associate Professor, Dept. of Child Health(N) ASRAM College Of Nursing
DEFINITION Aortic stenosis is a condition where the aortic valve narrows, restricting blood flow from the left ventricle to the aorta, and causing increased pressure in the left ventricle.
INCIDENCE • Aortic stenosis in children is relatively rare, occurring in approximately 3-6 per 10,000 live births. • It accounts for about 3-5% of all congenital heart defects, with a higher prevalence in males compared to females.
TYPES OFVSD • Valvular Aortic Stenosis: Narrowing at the level of the aortic valve, often due to a bicuspid aortic valve or valve leaflet fusion. • Subvalvular Aortic Stenosis: Obstruction below the aortic valve, usually caused by a fibrous membrane or muscular ridge. • Supravalvular Aortic Stenosis: Narrowing above the aortic valve, often due to a congenital anomaly such as Williams syndrome.
PATHOPHYSIOLOGY Aortic stenosis leads to obstruction of blood flow from the left ventricle to the aorta due to narrowing at the valve This leads to left ventricular hypertrophy Over time, the increased pressure can cause myocardial ischemia, reduced coronary perfusion, and eventually heart failure.
CLINICAL FEATURES • Decreased cardiac output • Faint pulse • Hypotension • Tachycardia • Chest pain • Exercise intolerance • Dizziness • Ventricular dysfunction
DIAGNOSTICTOOLS • Physical Examination: Presence of a systolic murmur, often heard at the right upper sternal border. • Electrocardiogram (ECG): May show left ventricular hypertrophy. • Echocardiogram: Essential for assessing valve area, gradient, and left ventricular function. • Chest X-ray: Shows left ventricular hypertrophy and post- stenotic dilation of the ascending aorta.
• Symptomatic or Severe Aortic Stenosis: Medical therapy includes beta-blockers, ACE inhibitors, and diuretics to manage heart failure symptoms, though these do not halt disease progression. MEDICAL MANAGEMENT • Asymptomatic or Mild Aortic Stenosis: Regular monitoring, control of hypertension, and prevention of endocarditis.
• Valvular Aortic Stenosis: Treated primarily with aortic valve replacement (AVR), either mechanical or bioprosthetic, or balloon valvuloplasty in certain cases, especially in children. • Subvalvular Aortic Stenosis: Requires surgical resection of the obstructing membrane or hypertrophic muscle tissue below the valve to relieve the obstruction. • Supravalvular Aortic Stenosis: Managed through patch aortoplasty, which involves widening the narrowed area above the aortic valve using a synthetic or autologous patch to improve blood flow. SURGICAL MANAGEMENT
PULMONARY STENOSIS Mr. Pradeep Abothu, M.Sc (N), PhD Scholar Associate Professor, Dept. of Child Health(N) ASRAM College Of Nursing
DEFINITION Pulmonary stenosis is a condition where the pulmonary valve narrows, obstructing blood flow from the right ventricle to the pulmonary artery, which leads to increased pressure in the right ventricle.
INCIDENCE • Pulmonary stenosis in children is relatively common, occurring in approximately 8- 12 per 10,000 live births. • It accounts for about 8-10% of all congenital heart defects, with a slightly higher prevalence in males compared to females.
TYPES OFVSD • Valvular Pulmonary Stenosis: Narrowing at the level of the pulmonary valve, often due to a congenitally malformed valve with fused or thickened leaflets. • Subvalvular Pulmonary Stenosis: Obstruction below the pulmonary valve, typically caused by a fibrous ring or muscular ridge. • Supravalvular Pulmonary Stenosis: Narrowing above the pulmonary valve, often due to a congenital anomaly such as Noonan syndrome.
PATHOPHYSIOLOGY Pulmonary stenosis results in an obstruction of blood flow from the right ventricle to the pulmonary artery due to narrowing at the valve, This forces the right ventricle to exert greater effort, leading to right ventricular hypertrophy (RVH) Persistent high pressure can cause myocardial ischemia, reduced pulmonary perfusion, and eventually right heart failure.
CLINICAL FEATURES • Decreased cardiac output • Weak and delayed pulse • Hypotension • Tachycardia • Chest pain • Exercise intolerance • Dizziness • Right ventricular dysfunction
DIAGNOSTICTOOLS • Physical Examination: Detection of a systolic ejection murmur, often heard at the left second intercostal space. • Electrocardiogram (ECG): May reveal right ventricular hypertrophy. • Echocardiogram: Crucial for evaluating the valve anatomy, gradient, and right ventricular function. • Chest X-ray: Displays right ventricular hypertrophy and possible post-stenotic dilation of the pulmonary artery.
• Symptomatic or Severe Aortic Stenosis: Medical therapy includes beta-blockers, diuretics to manage symptoms, and Prostaglandin E1 to maintain ductus arteriosus patency until the obstruction is corrected. MEDICAL MANAGEMENT • Asymptomatic or Mild Aortic Stenosis: Regular monitoring, control of hypertension, and prevention of endocarditis.
• Valvular Pulmonary Stenosis: Treated primarily with balloon valvuloplasty, which involves inflating a balloon across the stenosed valve to widen the opening, or surgical valvotomy if necessary. • Subvalvular Pulmonary Stenosis: Requires surgical resection of obstructive tissue below the valve to relieve the obstruction. • Supravalvular Pulmonary Stenosis: Managed with patch aortoplasty or other surgical techniques to widen the narrowed segment above the valve and improve blood flow. SURGICAL MANAGEMENT
CYANOTIC HEART DISEASES
TETROLOGY OF FALLOT Mr. Pradeep Abothu, M.Sc (N), PhD Scholar Associate Professor, Dept. of Child Health(N) ASRAM College Of Nursing
DEFINITION Tetralogy of Fallot is a congenital heart defect characterized by four abnormalities that result in a right-to-left shunt and is considered a cyanotic heart disease. The four defects are: • Ventricular Septal Defect (VSD): Abnormal opening between the right and left ventricles. • Pulmonary Stenosis: Narrowing of the pulmonary valve, restricting blood flow from the right ventricle to the lungs. • Overriding Aorta: The aorta is positioned above the VSD, allowing deoxygenated blood from both ventricles to enter the systemic circulation. • Right Ventricular Hypertrophy: Thickening of the right ventricular muscle due to the increased workload from pumping blood through the narrowed pulmonary valve.
INCIDENCE • Tetralogy of Fallot is one of the common congenital heart defects, with an incidence of approximately 1 in 2,000 to 3,000 live births. • It accounts for about 7-10% of all congenital heart defects.
PATHOPHYSIOLOGY Due toTOF Outflow of blood from pulmonary circulation restricted Causes R to L shunt Flow of deoxygenated blood enter arota throughVSD Right ventricular hypertrophy Deoxygenated blood reaches systemic circulation Cyanosis Polycythemia
CLINICAL FEATURES • Cyanosis • Dyspnea • Failure to Thrive • Fatigue • Irritability • Tet Spells: Some infants suddenly develop deep blue or grey skin, nails, and lips.These episodes occur during crying, eating, or upset moments and result from a rapid drop in blood oxygen levels. • Clubbed fingers or toes
DIAGNOSTICTOOLS • 2D Echo: Provides detailed images of heart structure and identifies defects like ventricular septal defect (VSD) and pulmonary stenosis. • Cardiac Catheterization: Measures heart chamber pressures and oxygen levels, confirming diagnosis and assessing defect severity. • Physical Examination: Includes observing cyanosis, listening for heart murmurs, and checking for clubbing of fingers and toes. • Chest X-ray: Shows a "boot-shaped" heart due to right ventricular hypertrophy and reduced lung blood flow markings. • Electrocardiogram (ECG): Detects signs of right ventricular hypertrophy and abnormal heart rhythms.
MEDICAL MANAGEMENT Medical management of Tetralogy of Fallot focuses on managing symptoms and preparing the patient for surgical intervention: • Prostaglandin E1 (PGE1) is administered to maintain ductal patency in newborns with severe cyanosis until surgical repair. • Beta-blockers and alpha-agonists are used to manage TET spells by reducing the heart rate and systemic vascular resistance. • Diuretics help in reducing fluid overload and managing congestive heart failure symptoms.
Surgical intervention is the definitive treatment forTetralogy of Fallot and is usually performed during infancy or early childhood, depending on the severity of symptoms and the child's overall health: a. Palliative Procedures: • Palliative measures may be employed when the child is too young for complete repair. • Palliative procedures, such as systemic-to-pulmonary artery shunt (e.g., Blalock-Taussig shunt,Waterston shunt, Potts procedure, and Brock's procedure), may be performed to temporarily improve oxygenation, especially in critically ill infants awaiting complete repair. SURGICAL MANAGEMENT
• Blalock-Taussig shunt: A surgical connection between the subclavian artery and pulmonary artery for congenital heart defects. • Waterston shunt: A surgical shunt between the ascending aorta and right pulmonary artery for improving blood flow. • Potts procedure: A surgical connection between the descending aorta and left pulmonary artery to increase lung perfusion. • Brock's procedure: An open-heart surgery to widen the narrowed pulmonary valve, improving blood flow to lungs.
b. Complete Repair: • Surgery is typically performed within the first year of life. • Complete Repair involves intracardiac surgery, where the primary approach is to close the ventricular septal defect (VSD) using a patch and perform pulmonary valvotomy to relieve pulmonary stenosis. This allows for redirection of blood flow to improve oxygenation.
TRANSPOSITION OF THE GREAT ARTERIES (TGA) Mr. Pradeep Abothu, M.Sc (N), PhD Scholar Associate Professor, Dept. of Child Health(N) ASRAM College Of Nursing
DEFINITION Transposition of the great arteries refers to a condition where the aorta arises from the right ventricle and the pulmonary artery arises from the left ventricle, resulting in two separate and parallel circulations.
INCIDENCE • It affects approximately 1 in every 3,500 live births. • Transposition of the great arteries accounts for approximately 5-7% of all congenital heart defects.
PATHOPHYSIOLOGY In transposition of the great arteries, the deoxygenated blood from the body returns to the right atrium, goes through the right ventricle, and is pumped back to the body through the aorta. The oxygenated blood from the lungs returns to the left atrium, goes through the left ventricle, and is pumped back to the lungs through the pulmonary artery. This results in two separate circulations, with oxygenated and deoxygenated blood unable to mix efficiently.
CLINICAL FEATURES Newborns with transposition of the great arteries usually exhibit • Cyanosis shortly after birth. Other signs and symptoms may include • Rapid breathing, • Chest indrawing • Poor feeding, • Lethargy • Heart murmur.
DIAGNOSTICTOOLS Diagnostic evaluation of transposition of the great arteries includes: Echocardiography: This is the primary tool for diagnosing TGA. It uses sound waves to create images of the heart, allowing visualization of the abnormal positioning of the great arteries. Electrocardiogram (ECG): An ECG records the electrical activity of the heart and can help identify any abnormalities in the heart’s rhythm and conduction. Chest X-ray: A chest X-ray may show an enlarged heart and abnormal positioning of the cardiac structures.
MEDICAL MANAGEMENT Medical management of transposition of the great arteries focuses on stabilizing the baby’s condition until surgical intervention can be performed.This may include: Prostaglandin infusion: Prostaglandin E1 is administered to keep the ductus arteriosus open, which allows for mixing of oxygenated and deoxygenated blood. Oxygen therapy: Supplemental oxygen is provided to alleviate cyanosis and improve oxygen saturation.
• The most common procedure is called an arterial switch operation, where the aorta and pulmonary artery are switched back to their correct positions. • This allows for proper oxygenation of the blood SURGICAL MANAGEMENT • The definitive treatment for transposition of the great arteries is surgical repair, usually performed in the first few weeks of life.
OTHER CONGENITAL HEART DISEASES • Total Anomalous Pulmonary Venous Return (TAPVR): TAPVR is a congenital defect where pulmonary veins connect to the right atrium instead of the left, mixing oxygen-rich and oxygen-poor blood, resulting in cyanosis and reduced oxygenation.
• Tricuspid Atresia: It is a cyanotic congenital heart disease in which the tricuspid valve is absent or completely closed. Blood cannot flow normally from the right atrium to the right ventricle. As a result, the right ventricle remains underdeveloped, and inadequate oxygenated blood reaches the body, causing cyanosis, breathing difficulty, poor feeding, and growth problems.
• Truncus Arteriosus: Truncus arteriosus is a congenital defect where a single blood vessel comes out of the ventricles, instead of separate aorta and pulmonary artery, causing mixed blood circulation and reduced oxygenation.
• Hypoplastic Left Heart Syndrome (HLHS): HLHS is a congenital heart defect where the left side of the heart is underdeveloped, leading to inadequate blood flow to the body, causing severe cyanosis and heart failure.
NURSING MANAGEMENT OF CONGENITAL HEART DISEASES
PRE OPERATIVE NURSING MANAGEMENT Nursing Assessment: • Gather a comprehensive history from the parents. • Conduct a thorough head-to-toe physical assessment, focusing on vital signs and oxygen saturation levels. • Assess the skin color for pink or cyanotic tones, and check peripheral pulses, the presence of edema, and the color and temperature of extremities. • Look for clubbing in the fingers or toes, and evaluate heart sounds for rate, rhythm, and any murmurs. • Observe for signs of respiratory distress and assess the child's activity tolerance and energy levels. • Additionally, consider the child's growth and developmental milestones.
Respiratory Management: • Position the child in a semi-upright position to ease breathing. • Suction oral and nasal secretions if necessary. • Continuously monitor oxygen saturation and provide supplemental oxygen as needed. • Perform arterial blood gas analysis when indicated.
Medication Administration: • Administer prescribed medications, including diuretics and bronchodilators. • Organize the medication schedule to allow for uninterrupted rest periods. • Check blood pressure before administering medications such as Digoxin and diuretics, do not administer if pressures are low.
Provide Rest & Comfort: • Ensure the child has uninterrupted periods of rest and sleep. • Advise parents to help with daily activities to conserve the child's energy. • Provide bed rest and avoid strenuous activities.
Nutritional Support: • Offer small, frequent feedings. • Administer a high-calorie formula if needed. • Monitor daily weight to ensure the child is receiving adequate nutrition. • Keep an intake and output chart. • Consider nasogastric feeding if the child struggles with oral feeds or shows signs of cyanosis while feeding.