Podcast
Questions and Answers
Which symptom is commonly associated with aortic stenosis?
Which symptom is commonly associated with aortic stenosis?
What is a characteristic finding during the physical examination of aortic stenosis?
What is a characteristic finding during the physical examination of aortic stenosis?
What management strategy is recommended for asymptomatic patients with aortic stenosis?
What management strategy is recommended for asymptomatic patients with aortic stenosis?
Which medication should be used with caution in patients with aortic stenosis?
Which medication should be used with caution in patients with aortic stenosis?
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Under what condition is surgical intervention indicated for aortic stenosis?
Under what condition is surgical intervention indicated for aortic stenosis?
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In a Type III hypersensitivity reaction, where do antigen-antibody complexes typically deposit?
In a Type III hypersensitivity reaction, where do antigen-antibody complexes typically deposit?
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Which of the following is a characteristic feature of a Type IV hypersensitivity reaction?
Which of the following is a characteristic feature of a Type IV hypersensitivity reaction?
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What is the primary immune mediator involved in Type I hypersensitivity reactions?
What is the primary immune mediator involved in Type I hypersensitivity reactions?
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What is the underlying mechanism of a Type II hypersensitivity reaction?
What is the underlying mechanism of a Type II hypersensitivity reaction?
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Which type of hypersensitivity reaction is associated with contact dermatitis from poison ivy?
Which type of hypersensitivity reaction is associated with contact dermatitis from poison ivy?
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In Systemic Lupus Erythematosus (SLE), a Type III hypersensitivity reaction, where do the antigen/antibody complexes primarily deposit causing tissue damage?
In Systemic Lupus Erythematosus (SLE), a Type III hypersensitivity reaction, where do the antigen/antibody complexes primarily deposit causing tissue damage?
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Which of the following is an example of a Type II hypersensitivity reaction?
Which of the following is an example of a Type II hypersensitivity reaction?
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What is the typical treatment for a non-severe case of contact dermatitis resulting from a Type IV hypersensitivity reaction?
What is the typical treatment for a non-severe case of contact dermatitis resulting from a Type IV hypersensitivity reaction?
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Which of the following best describes the mechanism of Type III hypersensitivity?
Which of the following best describes the mechanism of Type III hypersensitivity?
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What is the primary difference in the appearance of rashes between a Type I and Type IV hypersensitivity?
What is the primary difference in the appearance of rashes between a Type I and Type IV hypersensitivity?
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Which of these is an example of alloimmunity?
Which of these is an example of alloimmunity?
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In the clinical example provided, a patient with hay fever has what type of hypersensitivity reaction?
In the clinical example provided, a patient with hay fever has what type of hypersensitivity reaction?
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In the clinical example provided, a patient with hemolytic disease of the newborn has what type of hypersensitivity reaction?
In the clinical example provided, a patient with hemolytic disease of the newborn has what type of hypersensitivity reaction?
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In the clinical example provided, a patient with post-streptococcal glomerulonephritis has what type of hypersensitivity reaction?
In the clinical example provided, a patient with post-streptococcal glomerulonephritis has what type of hypersensitivity reaction?
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In the clinical example provided, a patient who was exposed to poison ivy and has contact dermatitis has what type of hypersensitivity reaction?
In the clinical example provided, a patient who was exposed to poison ivy and has contact dermatitis has what type of hypersensitivity reaction?
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Which of the following is a common risk factor for megaloblastic anemia in the elderly?
Which of the following is a common risk factor for megaloblastic anemia in the elderly?
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In a patient with folate deficiency, which of the following laboratory parameters would be expected to be elevated?
In a patient with folate deficiency, which of the following laboratory parameters would be expected to be elevated?
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A patient presents with fatigue, dyspnea, and tingling in their lower extremities. Which laboratory test would be most helpful in diagnosing their condition?
A patient presents with fatigue, dyspnea, and tingling in their lower extremities. Which laboratory test would be most helpful in diagnosing their condition?
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Which of the following is a common cause of drug-induced hemolytic anemia?
Which of the following is a common cause of drug-induced hemolytic anemia?
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A patient with sickle cell trait is considered to have which of the following?
A patient with sickle cell trait is considered to have which of the following?
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Which of the following is a characteristic of anemia of chronic disease?
Which of the following is a characteristic of anemia of chronic disease?
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What is the primary cause of anemia in patients with chronic renal failure?
What is the primary cause of anemia in patients with chronic renal failure?
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Which of the following factors increases afterload on the heart?
Which of the following factors increases afterload on the heart?
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Which of the following conditions directly affects the heart's contractility?
Which of the following conditions directly affects the heart's contractility?
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What is the primary mechanism by which atherosclerosis contributes to coronary artery disease?
What is the primary mechanism by which atherosclerosis contributes to coronary artery disease?
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Which of the following is a non-modifiable risk factor for coronary artery disease?
Which of the following is a non-modifiable risk factor for coronary artery disease?
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John, a 55-year-old male, presents with chest pain, shortness of breath, and fatigue. Which of the following laboratory findings would best support a diagnosis of coronary artery disease?
John, a 55-year-old male, presents with chest pain, shortness of breath, and fatigue. Which of the following laboratory findings would best support a diagnosis of coronary artery disease?
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In John's case, his elevated LDL cholesterol and low HDL cholesterol are considered which type of risk factor for CAD?
In John's case, his elevated LDL cholesterol and low HDL cholesterol are considered which type of risk factor for CAD?
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John's chest pain radiating to his left arm is a classic symptom of which cardiac condition?
John's chest pain radiating to his left arm is a classic symptom of which cardiac condition?
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Which of the following ECG findings is suggestive of myocardial ischemia?
Which of the following ECG findings is suggestive of myocardial ischemia?
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What is the primary pathophysiological mechanism underlying aortic stenosis?
What is the primary pathophysiological mechanism underlying aortic stenosis?
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What are the hallmark physical exam findings associated with aortic regurgitation?
What are the hallmark physical exam findings associated with aortic regurgitation?
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In the context of heart failure, what does NYHA Stage C represent?
In the context of heart failure, what does NYHA Stage C represent?
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Which of the following is a recognized risk factor for aortic regurgitation?
Which of the following is a recognized risk factor for aortic regurgitation?
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In the context of heart failure, what specific condition is commonly associated with right-sided heart failure occurring without left-sided heart failure?
In the context of heart failure, what specific condition is commonly associated with right-sided heart failure occurring without left-sided heart failure?
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Which of the following medications may be used to manage symptoms of heart failure and fluid overload?
Which of the following medications may be used to manage symptoms of heart failure and fluid overload?
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What is the primary pathophysiological consequence of aortic stenosis?
What is the primary pathophysiological consequence of aortic stenosis?
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Which of the following is a common risk factor for the development of heart failure?
Which of the following is a common risk factor for the development of heart failure?
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What is the purpose of a stress test in the management of heart failure?
What is the purpose of a stress test in the management of heart failure?
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When contractility is decreased in heart failure, what happens to the left ventricular end-diastolic volume (LVEDV)?
When contractility is decreased in heart failure, what happens to the left ventricular end-diastolic volume (LVEDV)?
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In NYHA functional classification, which stage indicates the most severe limitation of physical activity?
In NYHA functional classification, which stage indicates the most severe limitation of physical activity?
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Which of the following is NOT a recognized risk factor for aortic stenosis?
Which of the following is NOT a recognized risk factor for aortic stenosis?
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What is the definitive treatment for aortic regurgitation, if indicated?
What is the definitive treatment for aortic regurgitation, if indicated?
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What is the primary immunoglobulin involved in Type 1 hypersensitivity reactions?
What is the primary immunoglobulin involved in Type 1 hypersensitivity reactions?
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In the management of heart failure, what does the term "preload" refer to?
In the management of heart failure, what does the term "preload" refer to?
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What is the primary pathophysiological change that occurs in the left ventricle as a result of aortic stenosis?
What is the primary pathophysiological change that occurs in the left ventricle as a result of aortic stenosis?
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Which of the following symptoms are systemic responses associated with anaphylactic reactions?
Which of the following symptoms are systemic responses associated with anaphylactic reactions?
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What type of hypersensitivity reaction is primarily characterized by tissue specificity and cytotoxic effects?
What type of hypersensitivity reaction is primarily characterized by tissue specificity and cytotoxic effects?
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Which autoimmune condition is an example of a Type 2 hypersensitivity reaction?
Which autoimmune condition is an example of a Type 2 hypersensitivity reaction?
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In Type 3 hypersensitivity reactions, immune complexes cause tissue damage primarily by depositing in which locations?
In Type 3 hypersensitivity reactions, immune complexes cause tissue damage primarily by depositing in which locations?
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What is the main treatment used to reverse the effects of severe Type 1 hypersensitivity reactions?
What is the main treatment used to reverse the effects of severe Type 1 hypersensitivity reactions?
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Which of the following best describes a key characteristic of Graves' disease as a Type 2 hypersensitivity reaction?
Which of the following best describes a key characteristic of Graves' disease as a Type 2 hypersensitivity reaction?
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What triggers the formation of immune complexes in Type 3 hypersensitivity reactions?
What triggers the formation of immune complexes in Type 3 hypersensitivity reactions?
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Which of the following is a typical cause of secondary immunodeficiency?
Which of the following is a typical cause of secondary immunodeficiency?
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What is a key feature of Common Variable Immunodeficiency (CVI)?
What is a key feature of Common Variable Immunodeficiency (CVI)?
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Which lab value is typically decreased in iron deficiency anemia?
Which lab value is typically decreased in iron deficiency anemia?
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What type of vaccine is contraindicated for severely immunocompromised individuals?
What type of vaccine is contraindicated for severely immunocompromised individuals?
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Which of the following conditions is most likely to result in increased susceptibility to infections due to encapsulated bacteria?
Which of the following conditions is most likely to result in increased susceptibility to infections due to encapsulated bacteria?
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In which condition would you expect normal to increased serum ferritin levels?
In which condition would you expect normal to increased serum ferritin levels?
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Which factor is a common feature of all anemias?
Which factor is a common feature of all anemias?
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What is the typical serum iron level in thalassemia?
What is the typical serum iron level in thalassemia?
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Which statement best describes the immunoglobulin levels in Common Variable Immunodeficiency (CVI)?
Which statement best describes the immunoglobulin levels in Common Variable Immunodeficiency (CVI)?
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Which vaccine is considered safe for immunocompromised individuals?
Which vaccine is considered safe for immunocompromised individuals?
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What is an expected laboratory result in a patient with anemia of chronic disease?
What is an expected laboratory result in a patient with anemia of chronic disease?
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Which of the following best describes the Mean Corpuscular Hemoglobin Concentration (MCHC) in most microcytic anemias?
Which of the following best describes the Mean Corpuscular Hemoglobin Concentration (MCHC) in most microcytic anemias?
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What type of anemia is characterized by an increased RBC distribution width alongside low serum iron levels?
What type of anemia is characterized by an increased RBC distribution width alongside low serum iron levels?
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What is a possible consequence of immunocompromised individuals receiving live vaccines?
What is a possible consequence of immunocompromised individuals receiving live vaccines?
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Flashcards
Hypersensitivity Type 1
Hypersensitivity Type 1
Allergic reactions mediated by IgE causing local inflammation and systemic symptoms.
Anaphylactic Reaction
Anaphylactic Reaction
Severe systemic reaction with hypotension and bronchoconstriction, life-threatening.
Hypersensitivity Type 2
Hypersensitivity Type 2
Cytotoxic reactions targeting specific tissues, can cause damage or alter function.
Grave's Disease
Grave's Disease
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Cytotoxic Reaction
Cytotoxic Reaction
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Hypersensitivity Type 3
Hypersensitivity Type 3
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Immune Complex Deposition
Immune Complex Deposition
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Common Symptoms of Hyperthyroidism
Common Symptoms of Hyperthyroidism
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Type 2 Hypersensitivity
Type 2 Hypersensitivity
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Type 3 Hypersensitivity
Type 3 Hypersensitivity
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Rheumatoid Arthritis
Rheumatoid Arthritis
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Systemic Lupus Erythematosus (SLE)
Systemic Lupus Erythematosus (SLE)
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Flare-ups in SLE
Flare-ups in SLE
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Type 4 Hypersensitivity
Type 4 Hypersensitivity
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Type I vs Type IV Rash
Type I vs Type IV Rash
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Contact Dermatitis
Contact Dermatitis
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Antihistamines vs. Type IV
Antihistamines vs. Type IV
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IgE Mechanism
IgE Mechanism
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IgG/IgM Mechanism
IgG/IgM Mechanism
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Immune Complex Formation
Immune Complex Formation
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Delayed-Type Hypersensitivity
Delayed-Type Hypersensitivity
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RhoGAM
RhoGAM
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Post-Streptococcal Glomerulonephritis
Post-Streptococcal Glomerulonephritis
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Aortic Stenosis Symptoms
Aortic Stenosis Symptoms
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Systolic Ejection Murmur
Systolic Ejection Murmur
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Weak and Delayed Pulse
Weak and Delayed Pulse
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S4 Gallop
S4 Gallop
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Management of Aortic Stenosis
Management of Aortic Stenosis
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Primary Immunodeficiency
Primary Immunodeficiency
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Secondary Immunodeficiency
Secondary Immunodeficiency
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Common Variable Immunodeficiency (CVI)
Common Variable Immunodeficiency (CVI)
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Symptoms of CVI
Symptoms of CVI
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Vaccine Types for Immunocompromised
Vaccine Types for Immunocompromised
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Live Attenuated Vaccines
Live Attenuated Vaccines
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Inactivated Vaccines
Inactivated Vaccines
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mRNA Vaccines
mRNA Vaccines
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Iron Deficiency Anemia
Iron Deficiency Anemia
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Symptoms of Anemia
Symptoms of Anemia
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Ferritin
Ferritin
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RBC Distribution Width (RDW)
RBC Distribution Width (RDW)
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Thalassemia
Thalassemia
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Mean Corpuscular Hemoglobin Concentration (MCHC)
Mean Corpuscular Hemoglobin Concentration (MCHC)
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Management of CVI
Management of CVI
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Megaloblastic Anemia
Megaloblastic Anemia
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At-risk Groups for Megaloblastic Anemia
At-risk Groups for Megaloblastic Anemia
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Folate Deficiency
Folate Deficiency
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Vitamin B12 Deficiency Symptoms
Vitamin B12 Deficiency Symptoms
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Hemolytic Anemia
Hemolytic Anemia
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Sickle Cell Anemia
Sickle Cell Anemia
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Anemia of Chronic Disease
Anemia of Chronic Disease
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Anemia in Chronic Renal Failure
Anemia in Chronic Renal Failure
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Stroke Volume
Stroke Volume
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Coronary Artery Disease (CAD)
Coronary Artery Disease (CAD)
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CAD Risk Factors
CAD Risk Factors
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Angina Symptoms
Angina Symptoms
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Low-Density Lipoprotein (LDL)
Low-Density Lipoprotein (LDL)
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Myocardial Ischemia Indicators
Myocardial Ischemia Indicators
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Lifestyle Modifications
Lifestyle Modifications
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Pharmacotherapy
Pharmacotherapy
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Pathophysiology of Heart Failure
Pathophysiology of Heart Failure
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Decreased Contractility
Decreased Contractility
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Left Ventricular End-Diastolic Volume (LVEDV)
Left Ventricular End-Diastolic Volume (LVEDV)
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Right Heart Failure
Right Heart Failure
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Stage A Heart Failure
Stage A Heart Failure
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NYHA Stage II
NYHA Stage II
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Aortic Regurgitation
Aortic Regurgitation
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Diastolic Murmur
Diastolic Murmur
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Aortic Stenosis
Aortic Stenosis
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Risk Factors for Aortic Stenosis
Risk Factors for Aortic Stenosis
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Signs of Heart Failure
Signs of Heart Failure
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Management of Aortic Regurgitation
Management of Aortic Regurgitation
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Beta-Blockers
Beta-Blockers
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Study Notes
Hypersensitivity Reactions
- Four types: Type 1, Type 2, Type 3, Type 4
- Type 1: Immediate hypersensitivity (allergic reactions)
- Mediated by IgE antibodies
- Mast cell degranulation releases histamine
- Local symptoms: itching, rash
- Systemic symptoms: wheezing, hypotension, bronchoconstriction (anaphylaxis)
- Treatment: epinephrine
- Type 2: Cytotoxic hypersensitivity
- Antibody-mediated destruction of cells
- Tissue-specific (e.g., Graves' disease, incompatible blood transfusions)
- Macrophages play a role
- Antibodies (IgG or IgM) bind to cell surface antigens, leading to cell lysis or dysfunction
- Type 3: Immune complex-mediated hypersensitivity
- Antigen-antibody complexes form in the blood and deposit in tissues
- Triggers inflammation and tissue damage
- IgG or IgM antibodies bind to soluble antigens, forming complexes
- Complexes deposit in small blood vessels, causing damage (e.g., rheumatoid arthritis, SLE)
- Type 4: Delayed hypersensitivity
- Cell-mediated response by T cells
- Does not involve antibodies
- Macrophages and T cells involved.
- Delayed reaction-several days after contact with allergen (e.g., poison ivy)
- Rash is localized to the site of the allergen
Differentiating Type 1 vs. Type 4 Reactions
- Type 1: Immediate, widespread rash
- Type 4: Delayed, localized rash (e.g., contact dermatitis)
Treatment of Type 4 Reactions
- Topical corticosteroids
Hypersensitivity Mechanisms
- Type 1: IgE, mast cells, histamine, basophils
- Type 2: IgG, IgM, complement, phagocytes
- Type 3: IgG, IgM, complement, neutrophils
- Type 4: T cells (CD8+, CD4+), macrophages
Clinical Applications of Hypersensitivity (Examples)
- Type 1 (Allergic Rhinitis): Pollen exposure triggers sneezing, runny nose, etc. Treated with antihistamines and avoidance.
- Type 2 (Hemolytic Disease of the Newborn): Rh factor incompatibility. Prevented with RhoGAM.
- Type 3 (Post-Streptococcal Glomerulonephritis): Strep throat leads to kidney inflammation. Treated with supportive care.
- Type 4 (Poison Ivy): Contact with urushiol oil leads to a delayed rash. Treated with topical corticosteroids.
Primary and Secondary Immunodeficiencies
- Primary: Single gene defects (e.g., B-lymphocyte deficiency)
- Secondary: Due to other conditions (e.g., malnutrition, HIV, pregnancy)
Common Variable Immunodeficiency (CVI)
- Characterized by impaired antibody production
- Increased susceptibility to infections
Features of CVI
- Low immunoglobulin levels (IgG, IgA, IgM)
- Increased infections (respiratory, gastrointestinal)
- Potential for autoimmune disorders
Vaccine Considerations in Immunocompromised Individuals
- Live attenuated vaccines are contraindicated in severely immunocompromised patients.
- Inactivated and subunit/mRNA vaccines are generally safe.
- Vaccination of close contacts can help with herd immunity.
Hematology
- Anemia: Reduced red blood cell count. -Iron deficiency anemia: Low serum ferritin, low serum iron, high TIBC, low transferrin saturation. -Thalassemia: Increased serum ferritin (possible), normal/increased TIBC, normal/increased transferrin saturation. -Anemia of chronic disease: Normal to increased serum ferritin, normal RDW, normal to increased serum iron, slightly decreased TIBC, normal to decreased transferrin saturation. -Sideroblastic anemia: Normal to increased serum ferritin, increased RDW, normal to increased serum iron, normal TIBC, normal to increased transferrin saturation). -Mean Corpuscular Hemoglobin Concentration (MCHC): Normal or low in many types of anemias, low in iron deficiency, sideroblastic anemia, thalassemia. High MCHC seen in Hereditary spherocytosis.
- Megaloblastic anemia: Large, immature RBCs. Caused by B12 or folate deficiency. -Folate deficiency: Low folate, normal/low RBCs, high MCV, normal MCHC, normal/elevated reticulocyte count. -Vitamin B12 deficiency: Low B12, normal/low RBCs, increased MCV, normal MCHC.
Hemolytic Anemia
- RBC destruction
- Risk factors: Mismatched blood types, autoimmune reactions to own blood cells, drug reactions.
- Sickle cell anemia: Abnormal hemoglobin, normocytic (during steady state), hemolytic.
- Thalassemia: Inherited, decreased hemoglobin production, many possible genetic mutations.
- Anemia of chronic disease: Associated with chronic conditions, impaired erythropoiesis, functional iron deficiency.
- Anemia of chronic kidney disease: Decreased EPO production, normocytic, normochromic.
Cardiac Content
- Normal Blood Flow: Blood flows through the heart in a specific pathway. -Stroke Volume, Cardiac Output, Heart Sounds: Cardiac output measures the blood pumped per minute.
- Preload, Afterload, Contractility: These factors affect heart function. -Increased preload increases stroke volume, decreased preload decreases stroke volume, increased afterload decreases stroke volume, decreased afterload increases stroke volume.
Coronary Artery Disease (CAD)
- Pathophysiology: Atherosclerosis narrows coronary arteries, reducing blood flow.
- Risk Factors: Age, genetics, hypertension, hyperlipidemia, smoking, diabetes, obesity, physical inactivity, poor diet, chronic inflammation, stress
- Secondary causes of dyslipidemia: Diabetes mellitus, obesity, hypothyroidism, chronic kidney disease, liver disease, medications, other endocrine disorders.
Heart Failure
- Underlying pathophysiology: Less cardiac output to meet body's demands.
- Stages of heart failure are based on structural and functional changes as well as the patient's symptoms. NYHA functional classifications describe the impact on a patient's activity.
- Differentiating between right and left heart failure
Heart Valve Disorders
- Aortic Regurgitation: Blood flows backward into the ventricle during diastole, causing volume overload and eventually heart failure. Risk Factors: Congenital defects, rheumatic fever, infective endocarditis, aortic root disease, age
- Physical Exam Findings: Diastolic murmur, bounding pulses
- Management: Monitoring, medical (diuretics, vasodilators), and surgical (valve replacement)
- Aortic Stenosis: Narrowing of aortic valve restricts blood flow, leading to pressure overload and left ventricular hypertrophy. Risk factors: Age, bicuspid aortic valve, rheumatic fever, hyperlipidemia, radiation therapy.
- Physical Exam Findings: Systolic ejection murmur, weak/delayed pulse
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Description
Test your knowledge on the four types of hypersensitivity reactions. This quiz covers Type 1 (immediate allergic reactions), Type 2 (cytotoxic reactions), and Type 3 (immune complex-mediated reactions), including their mechanisms and associated symptoms. Understand how each type affects the immune system and its treatment options.