Cardiology Practice Questions

Q: A 25-year-old patient with a history of recent respiratory tract infection complains of severe chest pain at rest. The ECG of the patient is given. What is the most probable diagnosis?

Acute pericarditis. ***Acute pericarditis*** - **Recent respiratory tract infection** in a young patient followed by severe chest pain at rest is the classic presentation of **viral pericarditis**. - ECG typically shows **diffuse saddle-shaped ST elevation** with **PR depression** and no **reciprocal changes**, distinguishing it from myocardial infarction. *Acute myocardial infarction* - Would show **localized ST elevation** with **reciprocal ST depression** in opposite leads, not the diffuse pattern seen in pericarditis. - Uncommon in **young healthy patients** without significant risk factors like smoking, diabetes, or family history. *Prinzmetal angina* - Characterized by **transient ST elevation** during **coronary artery spasm**, typically occurring at night or early morning. - Pain is usually **brief and episodic**, not persistent severe chest pain, and resolves spontaneously with **nitroglycerin**. *Takotsubo cardiomyopathy* - Typically occurs in **postmenopausal women** following **emotional or physical stress**, not young patients with respiratory infections. - ECG shows **T-wave inversions** and **QT prolongation** rather than the ST elevation pattern of pericarditis.

Q: A young man reports retrosternal chest pain over the last few hours. The pain is not related to exertion and is relieved significantly on sitting up and leaning forward. What is the likely diagnosis?

Acute pericarditis. **Explanation:** The clinical presentation described is classic for **Acute Pericarditis**. The hallmark of pericardial pain is its **pleuritic nature** and its strong dependence on **body posture**. [3] 1. **Why Acute Pericarditis is correct:** The pain in pericarditis is caused by inflammation of the parietal pleura adjacent to the pericardium. Sitting up and leaning forward (the **"Tripod position"**) pulls the heart away from the diaphragm and adjacent pleura, thereby reducing friction and providing significant relief. [3] Conversely, the pain worsens in the supine position. 2. **Why other options are incorrect:** * **Rib Fracture:** Pain is typically localized, associated with a history of trauma, and worsens with direct palpation or deep inspiration, but is not specifically relieved by leaning forward. * **Angina Pectoris:** This is typically exertional, described as a "heaviness" or "pressure," and is relieved by rest or nitrates. [4] It does not change with posture. [2] * **Reflux Esophagitis:** While it causes retrosternal burning, it typically worsens after meals or when lying down, but it lacks the specific pleuritic/positional relief seen in pericarditis. **High-Yield Clinical Pearls for NEET-PG:** * **ECG Findings:** Look for **diffuse ST-segment elevation (concave upwards)** and **PR-segment depression** (the most specific early sign). [1] * **Physical Exam:** A **pericardial friction rub** (best heard with the diaphragm at the left lower sternal border) is pathognomonic. * **Treatment:** First-line treatment usually involves **NSAIDs (like Aspirin or Ibuprofen) plus Colchicine** to prevent recurrences. [1] * **Etiology:** Most common cause is viral (Coxsackievirus B). [1]

Q: A patient presents with low-grade fever. The ECG is shown below. What is the most probable diagnosis?

Pericarditis. ***Pericarditis*** - Classic ECG findings include **diffuse concave ST elevation** across multiple leads without reciprocal changes, often accompanied by **PR depression**. - The presence of **low-grade fever** is a typical clinical feature that supports the diagnosis of **acute pericarditis**. *Acute myocardial infarction* - ECG shows **convex ST elevation** in specific coronary territories with **reciprocal ST depression** in opposite leads. - Typically presents with **severe chest pain** and elevated **cardiac enzymes**, not the diffuse changes seen in pericarditis. *Old myocardial infarction* - ECG demonstrates **pathological Q waves** and **T wave inversions** in affected leads, indicating established **myocardial scarring**. - Would not present with **acute symptoms** like fever or the diffuse ST changes characteristic of pericarditis. *Hypothermia* - ECG classically shows **Osborn waves** (J waves) - positive deflections at the end of the QRS complex. - Patient would present with **low body temperature** and associated systemic signs, not fever as described in this case.

Q: What is the drug of choice in patients with Wolff-Parkinson-White syndrome experiencing atrial fibrillation?

Procainamide. ### Explanation In **Wolff-Parkinson-White (WPW) syndrome**, an accessory pathway (Bundle of Kent) bypasses the AV node [1]. When atrial fibrillation (AF) occurs in these patients, the accessory pathway can conduct impulses to the ventricles at extremely high rates because, unlike the AV node, it lacks a physiological delay (decremental conduction). **Why Procainamide is the Correct Answer:** Procainamide is a Class IA antiarrhythmic that **increases the refractory period of the accessory pathway**. By slowing conduction through the bypass tract, it reduces the ventricular rate and may even terminate the AF. In hemodynamically stable patients with WPW and AF, it is the drug of choice. (Note: If the patient is hemodynamically unstable, DC cardioversion is the immediate treatment). **Why the Other Options are Incorrect:** * **Digitalis (Digoxin), Verapamil, and Adenosine:** These are all **AV-nodal blocking agents**. By blocking the AV node, these drugs paradoxically favor conduction through the accessory pathway. This can lead to a rapid increase in ventricular rate, potentially degenerating into **Ventricular Fibrillation (VF)** and cardiac arrest. They are strictly contraindicated in WPW with AF. **Clinical Pearls for NEET-PG:** * **Classic Triad of WPW:** Short PR interval (<0.12s), Delta wave (slurred upstroke of QRS), and Wide QRS complex [1]. * **FBI Sign:** AF in WPW is often described as **F**ast, **B**road (wide QRS), and **I**rregular. * **Definitive Treatment:** Radiofrequency ablation of the accessory pathway. * **Avoid "ABCD" in WPW + AF:** **A**denosine, **B**eta-blockers, **C**alcium channel blockers (Verapamil/Diltiazem), and **D**igoxin.

Q: Which of the following statements regarding atrial fibrillation is false?

Brain imaging is routinely done.. ### Explanation **Why Option A is the Correct (False) Statement:** In the management of Atrial Fibrillation (AF), **brain imaging (CT or MRI) is not routinely performed** for every patient [1]. It is only indicated if the patient presents with focal neurological deficits suggestive of an acute stroke or a Transient Ischemic Attack (TIA). Routine management focuses on rate/リズム control and thromboembolism prophylaxis based on risk scores, rather than preemptive neuroimaging [1]. **Analysis of Other Options:** * **Option B (P waves are absent):** This is a hallmark ECG finding. In AF, organized atrial depolarization is replaced by rapid, chaotic electrical activity (fibrillatory waves), leading to the absence of distinct P waves and an "irregularly irregular" ventricular rhythm [1]. * **Option C (Anticoagulants are typically added):** AF increases the risk of atrial thrombus formation (especially in the left atrial appendage) [1]. Anticoagulation (Warfarin or NOACs like Apixaban) is a cornerstone of therapy, guided by the **CHA₂DS₂-VASc score** to prevent embolic stroke [1]. * **Option D (Palpitations are common):** Palpitations are the most frequent presenting symptom due to the rapid and irregular heartbeat. Other symptoms include dyspnea, fatigue, and lightheadedness. **High-Yield Clinical Pearls for NEET-PG:** * **Most common chronic arrhythmia:** Atrial Fibrillation [1]. * **Investigation of Choice:** 12-lead ECG [1]. * **CHA₂DS₂-VASc Score:** Used to decide the need for anticoagulation (Score ≥2 in men or ≥3 in women generally requires anticoagulation) [1]. * **HAS-BLED Score:** Used to assess the 1-year risk of major bleeding in patients on anticoagulation. * **Treatment Strategy:** Hemodynamically unstable patients require immediate **synchronized cardioversion**. Stable patients are managed with rate control (Beta-blockers, CCBs, or Digoxin) or rhythm control [1].

Q: A 38-year-old woman presented with shortness of breath and fatigue. Her history is unremarkable except for a vague history of fever and joint pain as a child. She notes some recent fatigue and difficulty in sleeping that she attributes to job-related stress. On examination, her heart rate is 120 beats/min. Echocardiogram revealed the following finding. Auscultation of the heart indicates a harsh systolic murmur during left ventricular ejection. Which of the following pathological findings is not related with the underlying etiology?

Pulmonary hypertension. ***Pulmonary hypertension*** - **Pulmonary hypertension** typically results from elevated **left atrial pressure** due to **mitral stenosis**, not aortic stenosis. - **Aortic stenosis** primarily causes **left ventricular pressure overload** without directly affecting pulmonary circulation. *Aortic regurgitation* - **Rheumatic fever** commonly affects both **aortic** and **mitral valves**, causing mixed lesions including **aortic regurgitation**. - **Bicuspid aortic valve** from rheumatic disease can lead to both **stenosis** and **regurgitation** over time. *Left ventricular hypertrophy* - **Aortic stenosis** causes **pressure overload** on the left ventricle, leading to **concentric hypertrophy**. - **LVH** is a direct compensatory mechanism to maintain **cardiac output** against increased **afterload**. *Mitral stenosis* - **Rheumatic fever** classically causes **mitral stenosis** through **commissural fusion** and **leaflet thickening**. - **Mitral stenosis** is the most common **rheumatic valvular lesion** and often coexists with **aortic involvement**.

Q: Comment on the diagnosis of the ECG tracing shown below?

Second degree AV block type 2, infranodal. ***Second degree AV block type 2, infranodal*** - Shows **constant PR intervals** with **sudden dropped QRS complexes** without preceding PR prolongation, characteristic of **Mobitz Type II**. - The **wide QRS complexes** and **infranodal location** (His-Purkinje system) indicate a more serious conduction defect requiring **pacemaker consideration**. *First degree AV block, intranodal* - Would show **prolonged PR interval >200ms** but **every P wave** would be followed by a QRS complex. - No **dropped beats** would be present, unlike the intermittent AV conduction seen here. *Second degree AV block type 1, intranodal* - Characterized by **progressive PR prolongation** followed by a dropped QRS (**Wenckebach phenomenon**). - Typically has **narrow QRS complexes** and occurs at the **AV nodal level**, not infranodal. *Third degree AV block* - Would show **complete AV dissociation** with **independent P waves and QRS complexes**. - The **ventricular rate** would be slower and **regular**, with no relationship between P waves and QRS complexes.

Q: A previously healthy 58-year-old man is admitted to the hospital because of an acute inferior myocardial infarction. Within several hours, he becomes oliguric and hypotensive (blood pressure is 90/60 mmHg). Insertion of a pulmonary artery (Swan-Ganz) catheter reveals the following pressures: pulmonary capillary wedge pressure - 4 mmHg; pulmonary artery pressure - 22/4 mmHg; and mean right atrial pressure - 11 mmHg. How would this patient be best treated?

Fluids. ### Explanation This patient is presenting with **Right Ventricular Infarction (RVI)**, a common complication occurring in up to 40% of patients with acute inferior wall MI (supplied by the Right Coronary Artery) [1]. **1. Why Fluids are Correct:** The hemodynamic profile provided is classic for RVI: * **Low PCWP (4 mmHg):** Indicates low left-sided filling pressures (normal: 6–12 mmHg) [2]. * **Elevated Right Atrial Pressure (11 mmHg):** Indicates right heart failure [1]. * **Hypotension and Oliguria:** Signifies low cardiac output. In RVI, the right ventricle fails to pump blood into the pulmonary circulation, leading to decreased preload for the left ventricle. The RV becomes "preload dependent." **Intravenous fluid resuscitation** (normal saline boluses) is the first-line treatment to increase right-sided filling pressures, which helps push blood through the lungs into the left atrium to maintain cardiac output [3]. **2. Why Other Options are Incorrect:** * **Digoxin:** Has no role in the acute management of MI-related cardiogenic shock; its inotropic effect is too weak and slow. * **Dopamine:** While an inotrope, it should only be used if hypotension persists *after* adequate fluid loading [3]. Starting vasopressors in a volume-depleted state can worsen ischemia. * **IABP:** Used for refractory cardiogenic shock or mechanical complications (e.g., papillary muscle rupture). It is not the initial step for RVI. **3. Clinical Pearls for NEET-PG:** * **Triad of RVI:** Hypotension, clear lung fields (normal PCWP), and Elevated JVP (Kussmaul’s sign). * **ECG Diagnosis:** ST-elevation in lead **V4R** (most sensitive). * **Management Contraindication:** Avoid **Nitrates, Diuretics, and Morphine** in inferior MI with suspected RVI, as they decrease preload and can precipitate profound hypotension. * **Hemodynamic Hallmark:** High RA pressure with low-to-normal PCWP (RA:PCWP ratio > 0.8).

Question 1

A 25-year-old patient with a history of recent respiratory tract infection complains of severe chest pain at rest. The ECG of the patient is given. What is the most probable diagnosis?

Accepted Answer

Acute pericarditis

Answer

Acute myocardial infarction

Answer

Prinzmetal angina

Answer

Takotsubo cardiomyopathy

Question 2

A young man reports retrosternal chest pain over the last few hours. The pain is not related to exertion and is relieved significantly on sitting up and leaning forward. What is the likely diagnosis?

Accepted Answer

Acute pericarditis

Answer

Rib fracture

Answer

Angina pectoris

Answer

Reflux esophagitis

Question 3

A patient presents with low-grade fever. The ECG is shown below. What is the most probable diagnosis?

Accepted Answer

Pericarditis

Answer

Acute myocardial infarction

Answer

Old myocardial infarction

Answer

Hypothermia

Question 4

What is the drug of choice in patients with Wolff-Parkinson-White syndrome experiencing atrial fibrillation?

Accepted Answer

Procainamide

Answer

Digitalis

Answer

Verapamil

Answer

Adenosine

Question 5

Which of the following statements regarding atrial fibrillation is false?

Accepted Answer

Brain imaging is routinely done.

Answer

P waves are absent on ECG.

Answer

Anticoagulants are typically added.

Answer

Palpitations are a common symptom.

Question 6

A 38-year-old woman presented with shortness of breath and fatigue. Her history is unremarkable except for a vague history of fever and joint pain as a child. She notes some recent fatigue and difficulty in sleeping that she attributes to job-related stress. On examination, her heart rate is 120 beats/min. Echocardiogram revealed the following finding. Auscultation of the heart indicates a harsh systolic murmur during left ventricular ejection. Which of the following pathological findings is not related with the underlying etiology?

Accepted Answer

Pulmonary hypertension

Answer

Aortic regurgitation

Answer

Left ventricular hypertrophy

Answer

Mitral stenosis

Question 7

Comment on the diagnosis of the ECG tracing shown below?

Accepted Answer

Second degree AV block type 2, infranodal

Answer

First degree AV block, intranodal

Answer

Second degree AV block type 1, intranodal

Answer

Third degree AV block

Question 8

A previously healthy 58-year-old man is admitted to the hospital because of an acute inferior myocardial infarction. Within several hours, he becomes oliguric and hypotensive (blood pressure is 90/60 mmHg). Insertion of a pulmonary artery (Swan-Ganz) catheter reveals the following pressures: pulmonary capillary wedge pressure - 4 mmHg; pulmonary artery pressure - 22/4 mmHg; and mean right atrial pressure - 11 mmHg. How would this patient be best treated?

Accepted Answer

Fluids

Answer

Digoxin

Answer

Dopamine

Answer

Intra-aortic balloon counterpulsation

Question 9

Which of the following are predisposing factors for Coronary Artery Disease?

Accepted Answer

Homocysteinemia, increased fibrinogen, increased plasminogen activator inhibitors 1

Answer

Homocysteinemia, decreased Lipoprotein B, increased plasminogen activator inhibitors 1

Answer

decreased Lipoprotein B, increased fibrinogen, increased plasminogen activator inhibitors 1

Answer

increased fibrinogen, increased HDL, increased plasminogen activator inhibitors 1

Question 10

A 20-year-old patient presents with syncope. His ECG shows specific findings, and his elder brother died suddenly. A subsequent cardiac MRI revealed fibro-fatty changes in the RV myocardium. What is the most likely diagnosis for this patient?

Accepted Answer

Arrhythmogenic RV dysplasia

Answer

Hypertrophic obstructive Cardiomyopathy

Answer

Brugada syndrome

Answer

Tako-Tsubo Cardiomyopathy

Cardiology — MCQs

Cardiology — MCQs

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