Atrioventricular Blocks - BMH/Tele
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The document discusses different types of atrioventricular blocks (AV blocks), including first-, second-, and third-degree AV blocks. It defines each type of block, describes their characteristic electrocardiogram patterns including rhythm, rate, and P wave and PRI intervals. Causes of temporary and permanent AV blocks are outlined. Management of complete AV block may involve pacemaker placement depending on symptoms and heart rate.
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3. Criteria for diagnosing acute MI based on ECG findings are provided.
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Vpcs
ventricular premature complexes and idioventricular rhythm identification is important in the ICU ..they may run into arryhthmias..look over my seminar...
any queries...
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2) The main causes listed are ventricular tachycardia (80% of cases) and supraventricular tachycardia with aberrancy.
3) Key features that can help differentiate the underlying rhythm include QRS duration, axis, morphology, and the presence or absence of AV dissociation on electrocardiogram.
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This document discusses various anthelmintic drugs including mebendazole, albendazole, thiabendazole, pyrantel pamoate, piperazine, levamisole, tetramisole, diethylcarbamazine, ivermectin, praziquantel, and niclosamide. It provides details on their mechanisms of action, pharmacokinetics, uses, and dosages for treating various helminth infections like roundworms, hookworms, tapeworms, and others. It also discusses the treatment of neurocysticercosis with albendazole and praziquantel along with corticosteroids and anti-conv
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Av nodal heart blocks by dr bashir ahmed dar associate professor medicine sop...
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Heart block is a delay in the conduction of electrical current as it passes through the atrioventricular node, bundle of His, or both bundle branches, all of which are located between the atria and the ventricles.ECG #5 - ID 168 - Left bundle branch block
A 58-year-old man followed for coronary artery disease presented with an ECG showing sinus rhythm at 88 beats per minute, a prolonged QRS duration of 145 milliseconds consistent with left bundle branch block, and no evidence of right or left ventricular hypertrophy or atrial enlargement. The left bundle branch block precludes diagnosing left ventricular hypertrophy and can mask underlying myocardial infarction.
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Bradycardias and conduction defects
Bradycardias and conduction defects
Sinus bradycardia
Sinus rhythm
Causes
Myocardial: inferior MI, myocarditis.
CV drugs: β-blockers, α2-agonists (clonidine), rate-limiting CCBs, digoxin, amiodarone.
CNS drugs: opioids, BZD.
Sick sinus syndrome
Metabolic: ↑K+, hypothyroidism, hypothermia.
Physiological states: high levels of fitness, pain.
Anorexia nervosa.
Cushing reflex: response to ↑ICP.
Sick sinus syndrome
Aka sinus node dysfunction.
Usually due to idiopathic SA node fibrosis. May also be secondary to cardiomyopathy, infiltrative disease (amyloidosis, sarcoidosis, haemochromatosis), drugs (digoxin, β-blockers), or metabolic problems (↑K+, ↓Ca2+, ↓thyroid).
Causes sinus bradycardia, sinus arrest, or exit block. May also cause episodes of tachycardia (tachy-brady syndrome, brady-tachy syndrome).
Keywords:
what is bradyarrhythmias, bradyarrhythmia vs bradycardia, types of bradyarrhythmias, sinus bradycardia, wide qrs complex bradycardia causes, bradyarrhythmia ppt, sinus bradycardia left axis deviation, wide complex bradycardia treatment, what is bradyarrhythmias, bradyarrhythmia vs bradycardia, types of bradyarrhythmias, sinus bradycardia, wide qrs complex bradycardia causes, bradyarrhythmia ppt, bradycardias and conduction defects
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its an easy looking but a difficult topic. I tried to cover it in this presentation. i hope it will help you somehow.
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4. Differentiate between intervals and segments
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Study Resources:
1. Chapter 11, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 9, Human Physiology - From Cells to Systems, Lauralee Sherwood, 9th edition
3. Chapter 29, Ganong’s Review of Medical Physiology, 26th edition
4. Electrocardiogram, StatPearls - https://www.ncbi.nlm.nih.gov/books/NBK549803/
5. ECG in Medical Practice by ABM Abdullah, 4th edition
6. Chapter 3, Cardiology Explained, https://www.ncbi.nlm.nih.gov/books/NBK2214/
7. ECG Basics, http://www.nataliescasebook.com/tag/e-c-g-basics
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Atrioventricular Blocks - BMH/Tele
- 6. 1 st Degree AV Block Causes: Increased vagal tone Hyperkalemia Amiodarone, BB’s, CCB’s, or Digitalis Acute Rheumatic Fever Myocarditis Temporary after an inferior wall MI Degenrative changes associated with aging Idiopathic
- 7. 1 st Degree AV Block Rhythm: Regular or Irregular (depends on underlying) Rate: 60 – 100 bpm (depends on underlying); can be faster or slower P waves: Upright & uniform PRI: > 0.20 sec (constant) QRS: usually narrow ( < 0.12 sec)
- 8. 1 st Degree AVB
- 11. 2 nd Degree AVB Type I
- 14. Complete AV Block Complete “communication breach” between the SA node and ventricular conduction known as AV dissociation The block may occur from within the AV junction or at the bundle branches, a lower area of the conduction system This will determine the ventricular rate and the morphology of the QRS complex
- 15. 3 rd Degree AVB
- 16. Complete AV Block If the block occurs at the AV junction, the firing rate will usually be 40-60 bpm with a narrow QRS complex If the block is in the bundle branches, then the rate will usually be 20-40 bpm with a wide QRS complex
- 17. Complete AV Block Ventricular rate is independent of the atrial rate (60-100) Some P waves may be hidden within the QRS or T wave PRI will vary greatly with no apparent pattern (unlike Mobitz 1 and Mobitz 2)
- 18. Complete AV Block Causes Temporary Complete AV Block: Inferior Wall MI, Increased vagal tone, drug effects, hyperkalemia, acute rheumatic fever, or myocarditis Causes Permanent Complete AV Block: Acute Anterior Wall MI Chronic Degenerative Changes related with Aging
- 20. Complete AV Block Complete AV Blovk with a Junctional Focus: QRS is narrow (rate 40-60)
- 21. Complete AV Block Complete AV Block with a Ventricular Focus: QRS is wide (rate 20-40)