Cardiology Practice Questions

Q: What is the most common cause of death in patients with Marfan syndrome?

Annuloaortic ectasia. **Explanation:** **Marfan Syndrome (MFS)** is an autosomal dominant connective tissue disorder caused by mutations in the **FBN1 gene** on chromosome 15, leading to defective fibrillin-1 [1]. This defect results in cystic medial necrosis of the large arteries. **1. Why Annuloaortic Ectasia is Correct:** The most common cause of death in Marfan syndrome (accounting for >80% of cases) is cardiovascular complications. Specifically, **Annuloaortic ectasia** (dilation of the proximal ascending aorta and aortic root) is the primary underlying pathology. This progressive dilation leads to **Aortic Root Aneurysm**, which eventually results in fatal complications like aortic rupture or severe aortic regurgitation leading to heart failure. **2. Analysis of Incorrect Options:** * **B. Mitral Valve Prolapse (MVP):** While MVP is the most common *valvular* abnormality in MFS, it is rarely the cause of death unless it leads to severe infective endocarditis or acute heart failure. * **C. Aortic Dissection:** This is a major cause of mortality and often occurs as a *consequence* of annuloaortic ectasia. However, the primary structural abnormality and leading cause of death cited in standard textbooks (like Harrison’s) is the progressive dilation (ectasia) of the aortic root. * **D. Abdominal Aortic Aneurysm (AAA):** In MFS, the pathology predominantly involves the **ascending aorta** [1]. AAA is more commonly associated with atherosclerosis and smoking, not Marfan syndrome. **3. NEET-PG High-Yield Pearls:** * **Most common cause of death:** Annuloaortic ectasia/Aortic root dilatation. * **Most common valvular lesion:** Mitral Valve Prolapse (MVP). * **Diagnostic Criteria:** Revised Ghent Nosology (focuses on Aortic root Z-score and Ectopia lentis). * **Management:** Beta-blockers or ARBs (Losartan) are used to slow the rate of aortic dilatation. Prophylactic surgery is indicated when the aortic diameter exceeds **5.0 cm**.

Q: Reperfusion is useful for which of the following?

Stunned myocardium. **Explanation:** The core concept tested here is the functional recovery of the myocardium following an ischemic insult. **1. Why Stunned Myocardium is correct:** **Stunned myocardium** refers to a state of prolonged systolic dysfunction that persists after blood flow has been restored (reperfusion) following a brief, acute episode of ischemia. Crucially, the tissue is **viable** but "stunned." While the dysfunction is temporary, **reperfusion is the prerequisite** for the eventual recovery of contractility [1]. Without timely reperfusion, the tissue would progress to necrosis; with it, the myocardium gradually recovers over days to weeks. **2. Why the other options are incorrect:** * **Hibernating Myocardium:** This is a state of chronic ventricular dysfunction due to **persistently reduced** coronary blood flow. While it is also viable, the primary treatment is **revascularization** (CABG/PCI) to restore chronic flow, rather than simple "reperfusion" in the acute sense. While it improves with flow, "Stunned" is the classic textbook answer for recovery following an acute reperfusion event. * **Non-ischemic Myocardium:** This tissue has normal blood flow and function; therefore, reperfusion therapy provides no clinical benefit. * **Mixed Ischemic Myocardium:** This is a non-specific clinical term and does not represent a distinct physiological state defined by its response to reperfusion in the same way stunning does. **Clinical Pearls for NEET-PG:** * **Stunned Myocardium:** Normal flow + Decreased function (Acute/Short-term). * **Hibernating Myocardium:** Decreased flow + Decreased function (Chronic/Long-term). * **Gold Standard for Viability:** PET scan (using FDG) is the most sensitive; Cardiac MRI (Late Gadolinium Enhancement) is also high-yield. * **Key Distinction:** Both stunning and hibernation represent **viable** tissue, meaning they have the potential for functional recovery, unlike infarcted (scar) tissue [1].

Q: A mid-diastolic murmur with presystolic accentuation is typically heard in which of the following conditions?

Mitral stenosis. ### Explanation **Correct Option: A. Mitral Stenosis (MS)** The classic murmur of Mitral Stenosis is a **low-pitched, mid-diastolic rumbling murmur**, best heard at the apex with the bell of the stethoscope in the left lateral decubitus position [1]. * **The Mid-diastolic component** occurs due to the pressure gradient between the left atrium (LA) and left ventricle (LV) during the passive filling phase [2]. * **Presystolic accentuation** occurs during late diastole due to **atrial contraction** (atrial kick), which increases the velocity of blood flow across the narrowed mitral orifice just before the first heart sound (S1). **Why other options are incorrect:** * **B. Mitral Regurgitation:** Characterized by a **holosystolic (pansystolic) murmur** radiating to the axilla. It occurs during systole, not diastole [1][3]. * **C. Aortic Stenosis:** Characterized by a **crescendo-decrescendo systolic ejection murmur** radiating to the carotids [1]. * **D. Mitral Valve Prolapse:** Typically presents with a **mid-systolic click** followed by a late systolic murmur [1]. **High-Yield Clinical Pearls for NEET-PG:** 1. **Loss of Presystolic Accentuation:** If a patient with MS develops **Atrial Fibrillation**, the presystolic accentuation disappears because there is no coordinated atrial contraction [2]. 2. **Opening Snap:** MS is often associated with an Opening Snap (OS) [1]. The shorter the **S2-OS interval**, the more severe the stenosis. 3. **Loud S1:** A hallmark of MS (provided the leaflets are mobile and not heavily calcified) [2]. 4. **Graham Steell Murmur:** An early diastolic murmur of pulmonary regurgitation heard in patients with MS due to secondary pulmonary hypertension.

Q: Graham Steell's murmur is an auscultatory finding of which condition?

Pulmonary regurgitation. **Explanation:** **Graham Steell’s murmur** is a high-pitched, decrescendo diastolic murmur heard best at the left second or third intercostal space (pulmonary area). It is caused by **Pulmonary Regurgitation (PR)** occurring in the setting of severe **pulmonary hypertension** (usually secondary to Mitral Stenosis) [1], [3]. The high pressure in the pulmonary artery causes the pulmonary valve ring to dilate, leading to functional regurgitation. **Analysis of Options:** * **Option B (Correct):** It is specifically defined as the murmur of functional PR due to pulmonary hypertension. It increases in intensity during inspiration (Carvallo’s sign) and is often indistinguishable from the murmur of Aortic Regurgitation (AR) by sound alone. * **Option A:** Aortic Regurgitation produces a similar early diastolic murmur, but it is best heard at the Erb’s point and radiates to the apex [2]. Unlike Graham Steell’s, it does not increase with inspiration. * **Option C:** Tricuspid incompetence (Regurgitation) produces a holosystolic murmur, not a diastolic one. * **Option D:** Aortic Stenosis produces a harsh crescendo-decrescendo systolic ejection murmur [1]. **Clinical Pearls for NEET-PG:** 1. **Distinguishing Feature:** Graham Steell’s murmur disappears if the underlying pulmonary hypertension is relieved (e.g., after successful mitral valve surgery). 2. **The "Austin Flint" Murmur:** Do not confuse this with the Austin Flint murmur, which is a mid-diastolic rumble heard at the apex in severe AR [2]. 3. **Key Association:** Classically associated with **Mitral Stenosis** leading to pulmonary arterial hypertension [3]. 4. **Inspiration:** Right-sided murmurs (PR, TR) generally increase with inspiration, while left-sided murmurs (AR, MR) do not.

Q: Oliver's sign is seen in which of the following conditions?

Aneurysm of the arch of the aorta. **Explanation:** **Oliver’s Sign** (also known as the tracheal tug) is a clinical sign characterized by an abnormal downward movement of the trachea during systole. **Why Option B is Correct:** The anatomical basis for Oliver’s sign lies in the relationship between the **arch of the aorta** and the **left main bronchus**. The aortic arch passes over the left main bronchus. In the presence of an **aneurysm of the arch of the aorta**, the expanded vessel presses against the bronchus [1]. During ventricular systole, the pulsatile expansion of the aneurysm pushes the bronchus (and consequently the trachea) downwards. This is best elicited by grasping the cricoid cartilage and applying upward tension while the patient is standing with their chin extended. **Why Other Options are Incorrect:** * **Option A (Ascending Aorta):** Aneurysms here typically present with aortic regurgitation or superior vena cava syndrome but do not involve the bifurcation of the trachea [1]. * **Option C (Descending Aorta):** These are located distal to the tracheal bifurcation and the left main bronchus, making a "tug" impossible [1]. * **Option D (Aortic Dissection):** While a dissection can occur in the arch, Oliver’s sign is classically associated with the chronic, saccular expansion seen in aneurysms (historically syphilitic) [2]. **NEET-PG High-Yield Pearls:** * **Cardarelli’s Sign:** A similar sign where leftward pulsation of the trachea is felt, also associated with aortic arch aneurysms. * **Campbell’s Sign:** Downward movement of the trachea during *inspiration* (seen in COPD), not to be confused with the systolic tug of Oliver’s sign. * **Historical Context:** Classically associated with tertiary syphilis (luetic aneurysms).

Question 1

What is the most common cause of death in patients with Marfan syndrome?

Accepted Answer

Annuloaortic ectasia

Answer

Mitral valve prolapse

Answer

Aortic dissection

Answer

Abdominal aortic aneurysm rupture

Question 2

Which of the following is a poor prognostic factor in acute myocardial infarction?

Accepted Answer

Hypotension at diagnosis

Answer

Ventricular premature complexes (VPCs) in the first 24 hours

Answer

Chest pain

Answer

Hypertension

Question 3

Which of the following conditions is characterized by the absence of P-waves?

Accepted Answer

Wolff-Parkinson-White (WPW) syndrome

Answer

Ventricular Tachycardia

Answer

Ventricular Fibrillation

Question 4

What is the primary purpose of performing a Thallium Myocardial Imaging (TMT)?

Accepted Answer

To evaluate Ischemic Heart Disease (IHD).

Answer

To evaluate latent Coronary Artery Disease (CAD).

Answer

To assess maximum working capacity.

Answer

All of the above.

Question 5

A young asymptomatic female is observed to have a midsystolic click on routine examination. Which valve is likely to show myxomatous degeneration?

Accepted Answer

Myxomatous degeneration

Answer

Aschoff bodies

Answer

Calcific degeneration

Answer

Ruptured chordae tendinae

Question 6

Reperfusion is useful for which of the following?

Accepted Answer

Stunned myocardium

Answer

Hibernating myocardium

Answer

Non-ischemic myocardium

Answer

Mixed ischemic myocardium

Question 7

A mid-diastolic murmur with presystolic accentuation is typically heard in which of the following conditions?

Accepted Answer

Mitral stenosis

Answer

Mitral regurgitation

Answer

Aortic stenosis

Answer

Mitral valve prolapse

Question 8

Graham Steell's murmur is an auscultatory finding of which condition?

Accepted Answer

Pulmonary regurgitation

Answer

Aortic regurgitation

Answer

Tricuspid incompetence

Answer

Aortic stenosis

Question 9

A 26-year-old woman presents with a 2-day history of worsening right leg pain and swelling. She recently completed an 8-hour car drive following a hiking trip. Initially, she attributed the pain to exertion, but it has progressively worsened. Her past medical history includes infertility and two spontaneous abortions. Physical examination reveals normal vital signs, heart, and lung findings. The right leg is swollen from the mid-thigh down and is tender. Doppler studies show a large deep venous thrombosis (DVT) in the femoral and iliac veins, extending into the pelvis. Laboratory results are unremarkable for electrolytes, WBC, platelet counts, and PT, but the aPTT is 3 times the normal value. A pregnancy test is negative. Low-molecular-weight heparin therapy has been initiated. What should be the subsequent management?

Accepted Answer

Warfarin with an INR goal of 2.5-3.5 for life

Answer

Rituximab 375 mg/m2 per week for 4 weeks

Answer

Warfarin with an international normalized ratio (INR) goal of 2.0-3.0 for 3 months

Answer

Warfarin with an INR goal of 2.0-3.0 for 12 months

Question 10

Oliver's sign is seen in which of the following conditions?

Accepted Answer

Aneurysm of the arch of the aorta

Answer

Ascending aortic aneurysm

Answer

Descending aortic aneurysm

Answer

Aortic dissection

Cardiology — MCQs

Cardiology — MCQs

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