Cardiology Practice Questions

Q: Prominent x descent in JVP is seen in all EXCEPT?

Tricuspid regurgitation. **Explanation:** The **x descent** in the Jugular Venous Pulse (JVP) represents atrial relaxation and the downward displacement of the tricuspid valve during ventricular systole. **Why Tricuspid Regurgitation (TR) is the correct answer:** In TR, blood leaks backward from the right ventricle into the right atrium during systole. This retrograde flow counteracts the normal drop in pressure, leading to the **obliteration or reversal of the x descent**. Instead, it is replaced by a prominent **'v' wave** (systolic filling) or a fused 'cv' wave. **Analysis of other options:** * **Cardiac Tamponade:** Characterized by a **prominent x descent** and an absent or diminished y descent. The high intrapericardial pressure prevents diastolic filling, making the x descent the dominant downward deflection. * **Constrictive Pericarditis:** Features **both prominent x and y descents**. The rapid ventricular filling in early diastole leads to a sharp y descent (Friedreich’s sign), but the x descent remains preserved and often exaggerated. * **Atrial Septal Defect (ASD):** Typically presents with a prominent x descent due to increased right-sided stroke volume and enhanced atrial emptying [1]. These shunts can be identified by the increased flow across the tricuspid valve visible on echocardiography [2]. **NEET-PG High-Yield Pearls:** 1. **Prominent 'a' wave:** Tricuspid stenosis, Pulmonary stenosis, Right ventricular hypertrophy (Non-compliant RV). 2. **Cannon 'a' waves:** Complete heart block (AV dissociation), Ventricular tachycardia. 3. **Absent 'a' wave:** Atrial fibrillation. 4. **Prominent 'y' descent:** Constrictive pericarditis, Tricuspid regurgitation. 5. **Absent/Slow 'y' descent:** Cardiac tamponade, Tricuspid stenosis.

Q: A 50-year-old man presents to the emergency department with chest pain and shortness of breath. He smokes 2 packs of cigarettes daily. His BP is 150/90 mmHg and HR is 110 bpm. An ECG is performed. What is your diagnosis?

Right ventricular hypertrophy. ***Right ventricular hypertrophy*** - Heavy smoking history with chest pain and dyspnea suggests **chronic obstructive pulmonary disease (COPD)** leading to **cor pulmonale** and subsequent RVH. - ECG findings would show **right axis deviation**, **dominant R wave in V1**, and **deep S waves in V5-V6**, consistent with RVH pattern. *Left ventricular hypertrophy* - While hypertension (150/90 mmHg) can cause LVH, the ECG would show **left axis deviation** and **tall R waves in V5-V6**. - LVH typically presents with **increased voltage in lateral leads** (V5, V6, I, aVL), not the pattern seen in chronic smokers with pulmonary disease. *Torsades de pointes* - This **polymorphic ventricular tachycardia** requires **prolonged QTc interval** as a prerequisite, which is not mentioned. - Presents with **twisting QRS complexes** around the baseline and is associated with **electrolyte imbalances** or **QT-prolonging medications**. *Inferior wall MI* - Would show **ST elevation in leads II, III, and aVF** with possible **reciprocal depression** in lateral leads. - Typically presents with **acute onset chest pain** and **elevated cardiac enzymes**, not chronic symptoms in a smoker.

Q: Postural hypotension can be a consequence of which of the following?

Autonomic dysfunction. **Explanation:** Postural (orthostatic) hypotension is defined as a sustained reduction in systolic blood pressure of at least **20 mmHg** or diastolic blood pressure of at least **10 mmHg** within 3 minutes of standing. **Why Option A is Correct:** The physiological response to standing involves venous pooling in the lower extremities, which triggers a baroreceptor reflex to increase sympathetic outflow (vasoconstriction and increased heart rate). In **Autonomic Dysfunction** (seen in Diabetes Mellitus, Parkinson’s disease, or Multiple System Atrophy), this reflex arc is damaged [1]. The body fails to compensate for the gravity-induced drop in venous return, leading to a significant fall in blood pressure [1]. **Why Options B and C are Incorrect:** While **Retroperitoneal bleeding** and **Entry site bleeds** (common post-cardiac catheterization) cause hypovolemia, they typically lead to **acute hemorrhagic shock** or compensatory tachycardia rather than "postural hypotension" as a primary diagnostic feature. While severe volume depletion *can* cause orthostatic changes, in the context of standard medical examinations, postural hypotension is classically associated with the failure of the autonomic nervous system to regulate vascular tone. **High-Yield Clinical Pearls for NEET-PG:** * **The "3-Minute Rule":** Always measure BP after the patient has been standing for 3 minutes. * **Common Causes:** Drugs (Alpha-blockers, Diuretics), Neurodegenerative diseases (Shy-Drager Syndrome), and Peripheral Neuropathies (Diabetes, Amyloidosis). * **Management:** Initial steps include lifestyle modifications (increased salt/water intake, compression stockings). Pharmacological options include **Fludrocortisone** (first-line) or **Midodrine**. * **Bedside Test:** A heart rate increase of >30 bpm upon standing suggests hypovolemia; a lack of heart rate compensation suggests autonomic failure [1].

Q: Kussmaul's sign is seen in all of the following except?

Cardiac tamponade. **Explanation:** **Kussmaul’s sign** is a paradoxical rise (or failure to fall) in Jugular Venous Pressure (JVP) during inspiration. Normally, inspiration creates negative intrathoracic pressure, increasing venous return to the right heart and causing JVP to drop. **Why Cardiac Tamponade is the correct answer:** In **Cardiac Tamponade**, Kussmaul’s sign is characteristically **absent** [1]. Although the heart is compressed by fluid, the intrapericardial pressure is transmitted equally to all chambers. During inspiration, the negative intrathoracic pressure is still transmitted to the pericardial space, allowing the heart to accommodate the increased venous return (often at the expense of the left ventricle—the mechanism behind *Pulsus Paradoxus*). Therefore, the JVP still falls normally. **Analysis of Incorrect Options:** * **Constrictive Pericarditis:** This is the classic cause [2]. A rigid, calcified pericardium prevents the right ventricle from expanding to accommodate inspiratory venous return, forcing the pressure back into the jugular veins. * **Right Ventricular (RV) Infarct:** A non-compliant, "stunned" RV cannot handle the increased preload during inspiration, leading to a backup of pressure [3]. * **Restrictive Cardiomyopathy:** Similar to constriction, the stiff myocardium limits diastolic filling, resulting in a positive Kussmaul’s sign. **High-Yield Clinical Pearls for NEET-PG:** * **The "Big Three" for Kussmaul’s Sign:** Constrictive Pericarditis, RV Infarct, and Tricuspid Stenosis/Regurgitation. * **Differentiating Factor:** Cardiac Tamponade presents with **Pulsus Paradoxus** but **NOT** Kussmaul’s sign. Constrictive Pericarditis presents with **Kussmaul’s sign** but rarely Pulsus Paradoxus. * **JVP Waveform:** In Tamponade, there is a prominent *x* descent and absent/blunted *y* descent. In Constriction, there is a sharp *y* descent (Friedreich’s sign).

Q: What ECG finding is shown?

Hyperacute T wave. ***Hyperacute T wave*** - **Tall, broad-based, peaked T waves** are the earliest ECG sign of **myocardial infarction**, appearing within minutes to hours of coronary occlusion. - These waves indicate **acute myocardial ischemia** and typically progress to **ST elevation** if the vessel remains occluded. *T wave Alternans* - Characterized by **alternating T wave morphology** (beat-to-beat variation) rather than consistently tall, peaked waves. - Associated with **electrical instability** and increased risk of **ventricular arrhythmias**, not acute coronary syndrome. *T wave inversion* - Shows **downward deflection** of T waves, indicating **myocardial ischemia** or **old infarction**. - Typically occurs **hours to days** after the hyperacute phase or represents **chronic changes** from previous cardiac events. *Artifact* - Would show **irregular, non-physiologic** waveforms that don't follow cardiac electrical patterns. - Often caused by **patient movement**, **loose electrodes**, or **electrical interference**, not consistent with systematic T wave changes.

Q: Aortic dissection is associated with which of the following?

Systemic hypertension. **Explanation:** **Aortic Dissection** occurs when a tear in the inner layer of the aorta (tunica intima) allows blood to surge into the media, creating a false lumen [1]. **Why Systemic Hypertension is the Correct Answer:** Systemic hypertension is the **most common predisposing factor** for aortic dissection, present in 70–80% of cases [1]. Chronic high blood pressure leads to mechanical stress and degenerative changes in the aortic wall (cystic medial necrosis), weakening the vessel and making it susceptible to intimal tearing [3]. **Analysis of Incorrect Options:** * **B. Coarctation of Aorta:** While associated with dissection, it is a much less common cause than hypertension [1]. It typically predisposes to dissection in younger patients or those with an associated bicuspid aortic valve. * **C. First Trimester of Pregnancy:** Pregnancy is a risk factor, but it is specifically associated with the **third trimester** and the peripartum period due to hypervolemia and hormonal changes (estrogen/progesterone) that alter the aortic wall collagen [1]. * **D. Takayasu’s Arteritis:** This is a large-vessel vasculitis that primarily causes **stenosis, occlusion, or aneurysm** formation. While it weakens the wall, it is not a classic or common cause of acute aortic dissection compared to hypertension. **High-Yield Clinical Pearls for NEET-PG:** * **Most common risk factor:** Hypertension (older patients); Marfan Syndrome (younger patients) [1]. * **Clinical Presentation:** Sudden onset, "tearing" or "ripping" chest pain radiating to the back [1]. * **Physical Exam:** Pulse deficit (asymmetric pulses) and a new murmur of aortic regurgitation [2]. * **Gold Standard Investigation:** CT Angiography (stable patients) or Transesophageal Echo (unstable patients) [2]. * **Classification:** Stanford Type A (involves ascending aorta; surgical emergency) vs. Type B (descending aorta; medical management) [1].

Question 1

Which of the following increases the susceptibility to coronary artery disease?

Accepted Answer

Nephrotic syndrome

Answer

Von Willebrand disease

Answer

Type V hyperlipoproteinemia

Answer

Systemic lupus erythematosus

Question 2

Which one of the following statements is true regarding Stokes-Adams attack?

Accepted Answer

It is usually caused by a high degree of atrioventricular block.

Answer

It is usually preceded by an aura.

Answer

Focal neurological signs are commonly observed during the attack.

Answer

It is caused by recurrent paroxysmal tachyarrhythmias.

Question 3

Prominent x descent in JVP is seen in all EXCEPT?

Accepted Answer

Tricuspid regurgitation

Answer

Cardiac tamponade

Answer

Atrial septal defect

Answer

Constrictive pericarditis

Question 4

A 50-year-old man presents to the emergency department with chest pain and shortness of breath. He smokes 2 packs of cigarettes daily. His BP is 150/90 mmHg and HR is 110 bpm. An ECG is performed. What is your diagnosis?

Accepted Answer

Right ventricular hypertrophy

Answer

Left ventricular hypertrophy

Answer

Torsades de pointes

Answer

Inferior wall MI

Question 5

Which of the following statements is NOT true regarding myocardial ischemia?

Accepted Answer

An akinetic area of the myocardium does not benefit from revascularization.

Answer

Late enhancement on Gd-enhanced MRI is suggestive of scar tissue.

Answer

Low-dose dobutamine can be used to assess hibernating myocardium.

Answer

Rest reinfection thallium scintigraphy is used to evaluate hibernating myocardium.

Question 6

Postural hypotension can be a consequence of which of the following?

Accepted Answer

Autonomic dysfunction

Answer

Retroperitoneal bleeding

Answer

Entry site bleed

Answer

All of the above

Question 7

Kussmaul's sign is seen in all of the following except?

Accepted Answer

Cardiac tamponade

Answer

Constrictive pericarditis

Answer

Right ventricular infarct

Answer

Restrictive cardiomyopathy

Question 8

Where is pulsatile liver and ascites found?

Accepted Answer

Tricuspid regurgitation

Answer

Critical pulmonary stenosis

Answer

Mitral regurgitation

Answer

Mitral stenosis

Question 9

What ECG finding is shown?

Accepted Answer

Hyperacute T wave

Answer

T wave Alternans

Answer

T wave inversion

Answer

Artifact

Question 10

Aortic dissection is associated with which of the following?

Accepted Answer

Systemic hypertension

Answer

Coarctation of aorta

Answer

First trimester of pregnancy

Answer

Takayasu's arteritis

Cardiology — MCQs

Cardiology — MCQs

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