Medical Pathophysiology Examination
Name: _______________________________ Date:
___________________
Instructions: Answer all questions. Choose the best response for
each multiple-choice question.
Section: Cardiovascular System
1. Which pathophysiological process is primarily responsible for
atherosclerosis?
A) Chronic inflammation of the arterial intima with lipid
accumulation and macrophage foam cell formation
B) Hypertrophy of the tunica media secondary to chronic
hyperkalemia
C) Autoimmune destruction of endothelial tight junctions
D) Deposition of amyloid fibrils in the adventitia
Answer: A
2. During myocardial infarction, irreversible myocardial cell injury
and necrosis typically begin after how long of severe ischemia?
A) 2 to 5 minutes
B) 20 to 40 minutes
C) 2 to 4 hours
, D) 12 to 24 hours
Answer: B
3. Which hormone is released by the heart in response to increased
atrial stretch and volume overload, promoting sodium and water
excretion?
A) Antidiuretic hormone (ADH)
B) Aldosterone
C) Atrial natriuretic peptide (ANP)
D) Angiotensin II
Answer: C
4. Which pathophysiological alteration is characteristic of left-
sided heart failure?
A) Peripheral dependent pitting edema and jugular venous
distension
B) Hepatomegaly and splenomegaly due to systemic congestion
C) Pulmonary congestion, dyspnea, and orthopnea
D) Ascites and increased central venous pressure
Answer: C
,5. What is the primary hemodynamic consequence of cardiac
tamponade?
A) Decreased systemic vascular resistance
B) Impaired diastolic filling leading to decreased stroke volume
and cardiac output
C) Acute left ventricular hypertrophy
D) Permanent closure of the aortic valve
Answer: B
6. In infective endocarditis, the hallmark vegetation on cardiac
valves consists of:
A) Pure calcium deposits
B) Fibrin, platelets, microcolonies of microorganisms, and
inflammatory cells
C) Proliferating endothelial cells and collagen
D) Necrotic myocardial muscle fibers
Answer: B
7. Which form of shock is characterized by widespread
vasodilation and maldistribution of blood flow resulting from a
severe systemic inflammatory response to infection?
A) Hypovolemic shock
B) Cardiogenic shock
, C) Septic shock
D) Anaphylactic shock
Answer: C
8. What is the primary mechanism by which renin raises blood
pressure?
A) Direct vasoconstriction of peripheral arterioles
B) Conversion of angiotensinogen to angiotensin I
C) Inhibition of aldosterone synthesis
D) Stimulation of vagal nerve activity
Answer: B
9. Prinzmetal (variant) angina is caused by:
A) Fixed atherosclerotic plaques occluding >70% of the coronary
lumen
B) Coronary artery vasospasm occurring independently of
physical activity
C) Microvascular dysfunction due to chronic hypertension
D) Embolic occlusion from mural thrombi
Answer: B