Arteriosclerosis and atherosclerosis are diseases that cause hardening and narrowing of arteries. Arteriosclerosis is thickening of arterial walls while atherosclerosis involves plaque buildup within artery walls from accumulation of lipids, calcium, and other substances. Major risk factors for atherosclerosis include age, smoking, diet, hypertension, diabetes, and stress. The formation of fatty streaks and plaques within artery walls can progress over decades and lead to complications when plaques rupture and form blood clots. Prevention focuses on lifestyle modifications like quitting smoking, regular exercise, healthy diet, weight control, and stress management.
Heart failure (HF) is a common cardiovascular condition with increasing incidence and prevalence. Unlike western countries where heart failure is predominantly a disease of elderly, in India it affects younger age group. Heart failure is a chronic condition in which the heart cannot pump enough blood and oxygen to support other organs in your body.
Arteriosclerosis is the most common disease of the arteries; the term means “hardening of the arteries”.
It is the diffuse process whereby the muscle fibers and the endothelial lining of the walls of small arteries and arterioles become thickened.
Atherosclerosis - Definition - Risk Factors - Lesser and Non Quantitated risk factors - Arterial wall - The development of Atherosclerosis - Many Features of the injury Hypothesis - The process of Atherogenesis - Pathogenesis in short - Morphology of Atheroma - Components of Atheromatous Plaque (MP) - Complications and clinical significance - Cardiovascular risk and its assessment.
Angina also known as angina pectoris is a medical condition characterized by chest pain usually left sided due to inadequate blood supply (ischemia) to the heart muscles due to obstruction (like presence of blood clot), narrowing or contraction (vasospasm) of the supplying coronary arteries.
Heart failure (HF) is a common cardiovascular condition with increasing incidence and prevalence. Unlike western countries where heart failure is predominantly a disease of elderly, in India it affects younger age group. Heart failure is a chronic condition in which the heart cannot pump enough blood and oxygen to support other organs in your body.
Arteriosclerosis is the most common disease of the arteries; the term means “hardening of the arteries”.
It is the diffuse process whereby the muscle fibers and the endothelial lining of the walls of small arteries and arterioles become thickened.
Atherosclerosis - Definition - Risk Factors - Lesser and Non Quantitated risk factors - Arterial wall - The development of Atherosclerosis - Many Features of the injury Hypothesis - The process of Atherogenesis - Pathogenesis in short - Morphology of Atheroma - Components of Atheromatous Plaque (MP) - Complications and clinical significance - Cardiovascular risk and its assessment.
Angina also known as angina pectoris is a medical condition characterized by chest pain usually left sided due to inadequate blood supply (ischemia) to the heart muscles due to obstruction (like presence of blood clot), narrowing or contraction (vasospasm) of the supplying coronary arteries.
Myocardial infarction (MI), commonly known as a heart attack, occurs when blood flow decreases or stops to a part of the heart, causing damage to the heart muscle. The most common symptom is chest pain or discomfort which may travel into the shoulder, arm, back, neck, or jaw.
Cardiomyopathy, or heart muscle disease, is a type of progressive heart disease in which the heart is abnormally enlarged, thickened, and/or stiffened. As a result, the heart muscle's ability to pump blood is less efficient, often causing heart failure and the backup of blood into the lungs or rest of the body. The disease can also cause abnormal heart rhythms.
Cirrhosis is a late stage of scarring (fibrosis) of the liver caused by many forms of liver diseases and conditions, such as hepatitis and chronic alcoholism.
Myocardial infarction (MI), commonly known as a heart attack, occurs when blood flow decreases or stops to a part of the heart, causing damage to the heart muscle. The most common symptom is chest pain or discomfort which may travel into the shoulder, arm, back, neck, or jaw.
Cardiomyopathy, or heart muscle disease, is a type of progressive heart disease in which the heart is abnormally enlarged, thickened, and/or stiffened. As a result, the heart muscle's ability to pump blood is less efficient, often causing heart failure and the backup of blood into the lungs or rest of the body. The disease can also cause abnormal heart rhythms.
Cirrhosis is a late stage of scarring (fibrosis) of the liver caused by many forms of liver diseases and conditions, such as hepatitis and chronic alcoholism.
Atherosclerosis is the gradual hardening and constriction of your arteries induced by cholesterol deposits lining the artery. It can jeopardise blood flow by clogging your arteries. It's also known as arteriosclerosis or atherosclerotic cardiovascular disease. It is the most common cause of heart attacks, strokes, and peripheral vascular disease, all of which are referred to as a cardiovascular disease.
this article discusses about coronary artery disease, its symptoms, presentations, risk factors, pathophysiology in short and primary prevention. this article is intended to present to a group of physicians in various disciplines other than cardiology.
Neha diwan presentation on aortic aneurysmNEHAADIWAN
An aortic dissection is a serious condition in which a tear occurs in the inner layer of the body's main artery (aorta).Aortic rupture is when all the layers of the aorta wall tear, causing blood to leak out from the aorta often due to a large aortic aneurysm that bursts. This will stop blood being pumped around the body and is life threatening. Ideally an aortic aneurysm will be repaired before a rupture can occur.
Coronary Atherosclerosis OR Coronary artery disease (CAD).pptxJITENDRAKUMARDAS15
Coronary atherosclerosis /CAD is characterized by accumulation of fatty deposits along the inner most layer of the coronary arteries.
The topic coronary atherosclerosis is summarized by introduction, definition, etiology, risk factors, clinical manifestation, pathophysiology, diagnostic evaluation, complications, preventions, management, nursing diagnosis.
Life blocked a presentation on coronary heart diseaseAbhi24681012
I made a power point presentation for my Grade 10 IB-MYP Personal Project. Heart Disease is the biggest killer in today's world . This is my small attempt to spread awareness about this disease. If you like this presentation please feel free to share with your friends and acquaintances.
Life blocked final prodduct 29 th septemberAbhi24681012
I made this power point for my Grade 10 IB-MYP Personal Project. Coronary Heart Disease is a burning topic as it is a major killer in both the developed and the developing countries. I made a small attempt to spread the message regarding this topic.
Report Back from SGO 2024: What’s the Latest in Cervical Cancer?bkling
Are you curious about what’s new in cervical cancer research or unsure what the findings mean? Join Dr. Emily Ko, a gynecologic oncologist at Penn Medicine, to learn about the latest updates from the Society of Gynecologic Oncology (SGO) 2024 Annual Meeting on Women’s Cancer. Dr. Ko will discuss what the research presented at the conference means for you and answer your questions about the new developments.
Title: Sense of Smell
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the primary categories of smells and the concept of odor blindness.
Explain the structure and location of the olfactory membrane and mucosa, including the types and roles of cells involved in olfaction.
Describe the pathway and mechanisms of olfactory signal transmission from the olfactory receptors to the brain.
Illustrate the biochemical cascade triggered by odorant binding to olfactory receptors, including the role of G-proteins and second messengers in generating an action potential.
Identify different types of olfactory disorders such as anosmia, hyposmia, hyperosmia, and dysosmia, including their potential causes.
Key Topics:
Olfactory Genes:
3% of the human genome accounts for olfactory genes.
400 genes for odorant receptors.
Olfactory Membrane:
Located in the superior part of the nasal cavity.
Medially: Folds downward along the superior septum.
Laterally: Folds over the superior turbinate and upper surface of the middle turbinate.
Total surface area: 5-10 square centimeters.
Olfactory Mucosa:
Olfactory Cells: Bipolar nerve cells derived from the CNS (100 million), with 4-25 olfactory cilia per cell.
Sustentacular Cells: Produce mucus and maintain ionic and molecular environment.
Basal Cells: Replace worn-out olfactory cells with an average lifespan of 1-2 months.
Bowman’s Gland: Secretes mucus.
Stimulation of Olfactory Cells:
Odorant dissolves in mucus and attaches to receptors on olfactory cilia.
Involves a cascade effect through G-proteins and second messengers, leading to depolarization and action potential generation in the olfactory nerve.
Quality of a Good Odorant:
Small (3-20 Carbon atoms), volatile, water-soluble, and lipid-soluble.
Facilitated by odorant-binding proteins in mucus.
Membrane Potential and Action Potential:
Resting membrane potential: -55mV.
Action potential frequency in the olfactory nerve increases with odorant strength.
Adaptation Towards the Sense of Smell:
Rapid adaptation within the first second, with further slow adaptation.
Psychological adaptation greater than receptor adaptation, involving feedback inhibition from the central nervous system.
Primary Sensations of Smell:
Camphoraceous, Musky, Floral, Pepperminty, Ethereal, Pungent, Putrid.
Odor Detection Threshold:
Examples: Hydrogen sulfide (0.0005 ppm), Methyl-mercaptan (0.002 ppm).
Some toxic substances are odorless at lethal concentrations.
Characteristics of Smell:
Odor blindness for single substances due to lack of appropriate receptor protein.
Behavioral and emotional influences of smell.
Transmission of Olfactory Signals:
From olfactory cells to glomeruli in the olfactory bulb, involving lateral inhibition.
Primitive, less old, and new olfactory systems with different path
These lecture slides, by Dr Sidra Arshad, offer a quick overview of physiological basis of a normal electrocardiogram.
Learning objectives:
1. Define an electrocardiogram (ECG) and electrocardiography
2. Describe how dipoles generated by the heart produce the waveforms of the ECG
3. Describe the components of a normal electrocardiogram of a typical bipolar leads (limb II)
4. Differentiate between intervals and segments
5. Enlist some common indications for obtaining an ECG
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. ECG Basics, http://www.nataliescasebook.com/tag/e-c-g-basics
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Acute scrotum is a general term referring to an emergency condition affecting the contents or the wall of the scrotum.
There are a number of conditions that present acutely, predominantly with pain and/or swelling
A careful and detailed history and examination, and in some cases, investigations allow differentiation between these diagnoses. A prompt diagnosis is essential as the patient may require urgent surgical intervention
Testicular torsion refers to twisting of the spermatic cord, causing ischaemia of the testicle.
Testicular torsion results from inadequate fixation of the testis to the tunica vaginalis producing ischemia from reduced arterial inflow and venous outflow obstruction.
The prevalence of testicular torsion in adult patients hospitalized with acute scrotal pain is approximately 25 to 50 percent
- Video recording of this lecture in English language: https://youtu.be/lK81BzxMqdo
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The prostate is an exocrine gland of the male mammalian reproductive system
It is a walnut-sized gland that forms part of the male reproductive system and is located in front of the rectum and just below the urinary bladder
Function is to store and secrete a clear, slightly alkaline fluid that constitutes 10-30% of the volume of the seminal fluid that along with the spermatozoa, constitutes semen
A healthy human prostate measures (4cm-vertical, by 3cm-horizontal, 2cm ant-post ).
It surrounds the urethra just below the urinary bladder. It has anterior, median, posterior and two lateral lobes
It’s work is regulated by androgens which are responsible for male sex characteristics
Generalised disease of the prostate due to hormonal derangement which leads to non malignant enlargement of the gland (increase in the number of epithelial cells and stromal tissue)to cause compression of the urethra leading to symptoms (LUTS
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Title: Sense of Taste
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the structure and function of taste buds.
Describe the relationship between the taste threshold and taste index of common substances.
Explain the chemical basis and signal transduction of taste perception for each type of primary taste sensation.
Recognize different abnormalities of taste perception and their causes.
Key Topics:
Significance of Taste Sensation:
Differentiation between pleasant and harmful food
Influence on behavior
Selection of food based on metabolic needs
Receptors of Taste:
Taste buds on the tongue
Influence of sense of smell, texture of food, and pain stimulation (e.g., by pepper)
Primary and Secondary Taste Sensations:
Primary taste sensations: Sweet, Sour, Salty, Bitter, Umami
Chemical basis and signal transduction mechanisms for each taste
Taste Threshold and Index:
Taste threshold values for Sweet (sucrose), Salty (NaCl), Sour (HCl), and Bitter (Quinine)
Taste index relationship: Inversely proportional to taste threshold
Taste Blindness:
Inability to taste certain substances, particularly thiourea compounds
Example: Phenylthiocarbamide
Structure and Function of Taste Buds:
Composition: Epithelial cells, Sustentacular/Supporting cells, Taste cells, Basal cells
Features: Taste pores, Taste hairs/microvilli, and Taste nerve fibers
Location of Taste Buds:
Found in papillae of the tongue (Fungiform, Circumvallate, Foliate)
Also present on the palate, tonsillar pillars, epiglottis, and proximal esophagus
Mechanism of Taste Stimulation:
Interaction of taste substances with receptors on microvilli
Signal transduction pathways for Umami, Sweet, Bitter, Sour, and Salty tastes
Taste Sensitivity and Adaptation:
Decrease in sensitivity with age
Rapid adaptation of taste sensation
Role of Saliva in Taste:
Dissolution of tastants to reach receptors
Washing away the stimulus
Taste Preferences and Aversions:
Mechanisms behind taste preference and aversion
Influence of receptors and neural pathways
Impact of Sensory Nerve Damage:
Degeneration of taste buds if the sensory nerve fiber is cut
Abnormalities of Taste Detection:
Conditions: Ageusia, Hypogeusia, Dysgeusia (parageusia)
Causes: Nerve damage, neurological disorders, infections, poor oral hygiene, adverse drug effects, deficiencies, aging, tobacco use, altered neurotransmitter levels
Neurotransmitters and Taste Threshold:
Effects of serotonin (5-HT) and norepinephrine (NE) on taste sensitivity
Supertasters:
25% of the population with heightened sensitivity to taste, especially bitterness
Increased number of fungiform papillae
4. DEFINITION OF ARTERIOSCLEROSIS
Arteriosclerosis is the most common disease
of the arteries; the term means “hardening
of the arteries”.
It is the diffuse process whereby the muscle
fibers and the endothelial lining of the walls
of small arteries and arterioles become
thickened
5. DEFINITION OF ATHEROSCLEROSIS
Atherosclerosis is a different process,
affecting the intima of the large and medium
sized arteries.
These changes consist of accumulation of
lipids, calcium, blood components,
carbohydrates and fibrous tissue on the
intimal layer of the artery.
These accumulation are referred to as
atheromas or plaques.
6.
7. ATHEROSCLEROSIS
The major targets are the aorta, the coronary
and cerebral arteries.
Begins in infants and childhood and
progresses slowly over the decades.
Often produces critical ischemia of the
intestines and lower extremities, a major
cause of abdominal aortic aneurysms.
15. NORMAL ARTERIAL WALL
The normal arterial wall consist of smooth
muscles and connective tissue with an
endothelial covering.
16. FORMATION OF FATTY STREAK
The fatty streaks will develop in the coronory
arteries at the age of15 onwards.
When the fatty streak develop a yellow ting
will be appear in the wall of blood vessels.
17. STABLE PLAQUE (FIBROUS PLAQUE FORMATION)
The fibrous plaque stage is the beginning of
progressive changes in the endothelium of
arterial wall.
This changes will appear in the age of 13
and increase with age.
Normally the endothelium repairs
immediately after injury but, in persons with
CAD the endothelium is not rapidly replaced.
18. It allows the accumulation of LDL and growth
factor which causes the thickening of the
arterial wall.
Then the fatty streak is eventually covered by
collagen and forming a fibrous plaque which
is greyish or whitish in colour.
19. VULNERABLE PLAQUE OR COMPLICATED
LESIONS
It is the final stage of development of
atherosclerotic lesions and it is the most
dangerous stage.
As fibrous plaque grows, the continuous
inflammation can cause plaque instability,
ulceration and rupturing.
When rupturing occurs the bleeding will be
get started and as a result aggregation of
platelets will occur which will leads to the
formation of thrombus.
20. Further, growth of thrombus and
accumulation of platelets will leads to the
total accumulation of platelets and the total
occlusion of the arteries.
23. DIAGNOSIS
1. History collection and physical
examination
The family history, nutritional history
and personal history should be collected
from the patient.
during physical examination the
nurse should check the characteristics of
pulse.(some times patient may have weak
thready pulse)
24. ~ Auscultation for the heart sounds
incase of atherosclerosis an
oozing sound will be present, it is the
turbulence sound during the flow of blood.
25. 2. Blood studies
it is necessary to check the complete
lipid profile of the patient.
3. Electrocardiogram (ECG).
An electrocardiogram records
electrical signals as they travel through the
heart. An ECG can often reveal evidence of a
previous heart attack or one that's in
progress.
26. 4. Holter monitoring
it may be recommended sometimes.
With this type of ECG, patient wear a
portable monitor for 24 hours as the patient
go about his normal activities.
5. Echocardiogram.
An echocardiogram uses sound
waves to produce images of heart. During an
echocardiogram, the doctor can determine
whether all parts of the heart wall are
contributing normally to the heart's pumping
activity.
27. 6. Exercise stress test
If the signs and symptoms
occur most often during exercise, doctor may
ask to walk on a treadmill during an ECG.
This is known as an exercise stress test.
In some cases, medication to stimulate the
heart may be used instead of exercise.
28. 7. Cardiac catheterization or angiogram.
To view blood flow through heart, the
doctor may inject a special dye into coronary
arteries. This is known as an angiogram.
The dye is injected into the arteries of the
heart through a long, thin, flexible tube
(catheter) that is threaded through an artery,
usually in the leg, to the arteries in the heart.
29. This procedure is called cardiac
catheterization. The dye outlines narrow
spots and blockages on the X-ray images.
If the patient have a blockage that requires
treatment, a balloon can be pushed through
the catheter and inflated to improve the blood
flow in coronary arteries.
A mesh tube (stent) may then be used to
keep the dilated artery open.
30. 8. CT scan.
Computerized tomography (CT)
technologies can help the doctor see calcium
deposits in arteries that can narrow the
arteries. If a substantial amount of calcium is
discovered, coronary artery disease can be
suspect.
32. LIFE STYLE MODIFICATIONS
Stop smoking. Smoking damages the
arteries. If patient smoke or use tobacco in
any form, quitting is the best way to halt the
progression of atherosclerosis and reduce
your risk of complications.
Exercise most days of the week. Regular
exercise can condition the muscles to use
oxygen more efficiently.
33. Eat healthy foods. A heart-healthy diet
based on fruits, vegetables and whole grains
— and low in refined carbohydrates, sugars,
saturated fat and sodium — can help to
control the weight, blood pressure,
cholesterol and blood sugar.
34. Manage stress. Reduce stress as much as
possible. Practice healthy techniques for
managing stress, such as muscle relaxation
and deep breathing.
Avoid alcohol
Avoid high fat and oil diet
Drink more water
35. PHARMACOLOGICAL MANAGEMENT
Anti-platelet medications.
The doctor may prescribe
anti-platelet medications, such as aspirin, to
reduce the likelihood that platelets will clump
in narrowed arteries, form a blood clot and
cause further blockage.
36. Beta blocker medications.
These medications are commonly
used for coronary artery disease. They lower
the heart rate and blood pressure.
Eg:propanolol
atenolol
37. Angiotensin-converting enzyme (ACE)
inhibitors. These
medications may help slow the progression
of atherosclerosis by lowering blood
pressure.
Eg: captopril
ramipril
38. Calcium channel blockers.
These medications lower blood
pressure and are sometimes used to treat
angina.
Eg: verapamil
amlodipin
40. SURGICAL MANAGEMENT
Angioplasty and stent placement.
In this procedure, the doctor
inserts a long, thin tube (catheter) into the
blocked or narrowed part of your artery.
A second catheter with a
deflated balloon on its tip is then passed
through the catheter to the narrowed area.
41. The balloon is then inflated, compressing the
deposits against the artery walls.
A mesh tube (stent) is usually left in the
artery to help keep the artery open.
42. Coronary Artery Bypass Surgery. (CABG)
The doctor may create a graft bypass
using a vessel from another part of the body
or a tube made of synthetic fabric.
This allows blood to flow around the
blocked or narrowed artery.
43. Embolectomy:
It is the removal of emboli or clot
from the artery.
Thrombectomy:
It is the removal of thrombus from
the artery.
44. Endarterectomy.
In some cases, fatty deposits
must be surgically removed from the walls of
a narrowed artery. When the procedure is
done on arteries in the neck (the carotid
arteries), it's called a carotid endarterectomy.
45.
46. NURSING MANAGEMENT
Assess the patient for pain
Monitor vital signs of patient
Nurses need to assess patient’s learning
needs.
One way of motivating patients is to modify
their behavior is to help them understand the
nature of atherosclerosis, its prognosis and
ways to control disease progression.
47. Nurses need to explain the risk factors
related to atherosclerosis and focus on life
style changes.
Nurses should educate patients about the
effect of smoking on the arterial system.
Encourage adherence of cholesterol lowering
medications and other medications.
48. Recommend follow up of patients on statins
to monitor required lowering cholesterol.
Accompany any prescription of medication
with dietary control.
49. PREVENTION
Get regular medical checkups.
• Control blood pressure.
• Check cholesterol.
• Don’t smoke.
• Exercise regularly.
• Maintain a healthy weight.
• Eat a heart-healthy diet.
• Manage stress.