Cardiology Practice Questions

Q: Levine sign is seen in

Acute Myocardial Infarction. ***Acute Myocardial Infarction*** - The **Levine sign** is a classic nonverbal gesture where a patient clenches their fist over the sternum, indicating **retrosternal chest pain** [1]. - This sign is highly suggestive of **ischemic chest pain**, often associated with an **acute myocardial infarction** [1]. *Pulmonary embolism* - Chest pain in pulmonary embolism is typically **pleuritic**, sharp, and localized, often worsened by breathing. - It does not usually present with the diffuse, constrictive quality expressed by the **Levine sign**. *Esophageal spasm* - Chest pain from esophageal spasm can mimic cardiac pain, but it is often described as a **squeezing or crushing sensation** behind the sternum and may be relieved by nitrates. - While it can be severe, it is less consistently associated with the **Levine sign** compared to myocardial infarction. *Aortic dissection* - The pain of aortic dissection is typically described as **sudden, severe, tearing, or ripping** and often radiates to the back. - It usually has a unique quality that is distinct from the constrictive pain signaled by the **Levine sign**.

Q: HOCM is common in which age group?

20 - 40 years. ***20 - 40 years*** - **Hypertrophic obstructive cardiomyopathy (HOCM)** is most commonly diagnosed in young to middle-aged adults, often presenting with symptoms during this age range [1]. - While it is a genetic condition present from birth, symptoms and diagnosis frequently occur in individuals who are **20 to 40 years old** [1]. *10 - 30 years* - While HOCM can manifest in adolescence, the peak incidence and symptomatic presentation typically extend into the 30s, making this range too narrow. - Many individuals in this group might be diagnosed during routine screenings or due to family history, but active symptom presentation often continues beyond 30 [1]. *30 - 50 years* - This age group is partially correct, but the onset often begins earlier, in the 20s. - Significant clinical manifestations and diagnoses are often made before the age of 30, making the 20-40 range more accurate for typical presentation. *40 - 60 years* - Although HOCM can persist and cause problems in older age, initial diagnoses and symptom onset are less common in this age group compared to younger adults [1]. - Patients diagnosed in this range often represent later presentations or milder forms that become symptomatic with aging [1].

Q: The most common reentrant tachycardia associated with WPW syndrome is

Orthodromic atrioventricular reentry. ***Orthodromic atrioventricular reentry*** - This is the **most common type** of reentrant tachycardia in **WPW syndrome**, accounting for approximately 90-95% of cases [2]. - Involves **conduction down the AV node-His-Purkinje system** and **retrograde up the accessory pathway**, resulting in a narrow QRS tachycardia [2]. *Antidromic atrioventricular reentry* - This form of reentrant tachycardia is **less common**, involving conduction **down the accessory pathway** and retrograde up the AV node. - It presents with a **wide QRS complex tachycardia**, mimicking VT, due to ventricular pre-excitation [1]. *Rapidly conducting atrial fibrillation* - While **atrial fibrillation** can occur in WPW syndrome and conduct rapidly across the accessory pathway, it is an **arrhythmia, not a reentrant tachycardia itself** [2]. - Rapid conduction via the accessory pathway during AF can lead to **ventricular fibrillation**, which is life-threatening, but it is not the most common reentrant mechanism [2]. *None of the options* - This option is incorrect as **orthodromic atrioventricular reentry** is indeed the most common reentrant tachycardia in WPW syndrome.

Q: In a clinical context, the most common toxin causing Dilated Cardiomyopathy is:

Alcohol. ***Alcohol*** - Chronic excessive **alcohol consumption** is a well-established and prevalent cause of **dilated cardiomyopathy (DCM)**, leading to alcoholic cardiomyopathy [1]. - Alcohol and its metabolite, **acetaldehyde**, have direct toxic effects on **myocardial cells**, impairing contractility and leading to ventricular dilation [1]. *Chemotherapeutic agents* - Certain **chemotherapeutic agents**, such as **anthracyclines** (e.g., doxorubicin), can cause dose-dependent cardiotoxicity leading to DCM. - While significant, their incidence of causing DCM is less common in the general population compared to alcohol abuse. *Heavy metal* - **Heavy metal toxicity**, particularly from **lead**, **mercury**, or **cobalt**, can contribute to cardiomyopathy. - This is a less common cause of DCM in clinical practice compared to alcohol, often seen in specific industrial exposures or poisoning. *Occupational exposure* - **Occupational exposures** to certain chemicals or toxins can rarely cause DCM, but this category is broad and less frequently implicated than alcohol. - Specific toxins would need to be identified; without that, it's not the most common clinical cause.

Q: Ejection click of pulmonary stenosis is better heard in

Inspiration. Inspiration - The **pulmonic ejection click** is associated with the opening of a **domed pulmonary valve** during systole [1]. - During **inspiration**, increased right ventricular filling causes more blood to be ejected, leading to earlier and louder opening of the stenotic pulmonary valve, making the click more prominent. Expiration - During **expiration**, venous return to the right side of the heart is reduced, decreasing right ventricular volume and making the pulmonic ejection click less noticeable or even absent. - This respiratory variation helps distinguish a pulmonic ejection click from an aortic ejection click, which does not vary with respiration [1]. Patient bending forward - **Bending forward** is a maneuver primarily used to accentuate **aortic regurgitation** murmurs, not to optimize the hearing of a pulmonic ejection click. - This position brings the heart closer to the chest wall, enhancing sounds originating from the left side of the heart. Patient lying in left lateral position - The **left lateral position** is commonly used to accentuate **mitral valve** sounds, such as the opening snap of mitral stenosis or the murmur of mitral regurgitation [1]. - This position does not specifically improve the audibility of a pulmonic ejection click.

Q: Which of the following statements is true about Prinzmetal's angina?

May present at rest. ***May present at rest*** - Prinzmetal's angina, also known as **variant angina**, is characterized by episodes of chest pain that typically occur at **rest**, often in the early morning hours, which is a key distinguishing feature from stable angina. - This presentation at rest is due to transient **coronary artery spasm**, reducing blood flow to the myocardium. *Occurs due to atherosclerotic obstruction of coronary arteries* - While patients with Prinzmetal's angina may have some underlying atherosclerosis, the direct cause of the anginal episodes is **coronary artery spasm**, not fixed atherosclerotic obstruction. - **Stable angina** and **unstable angina** are primarily caused by atherosclerotic narrowing. *It typically occurs during exercise* - **Stable angina**, not Prinzmetal's angina, is the type of angina that typically occurs during **physical exertion** or emotional stress. - Prinzmetal's angina is notable for its occurrence at rest, often without clear precipitating factors, distinguishing it from exertional angina. *Beta-blockers are the first-line treatment for Prinzmetal's angina.* - **Calcium channel blockers** (e.g., diltiazem, verapamil, nifedipine) and **nitrates** are the first-line treatments for Prinzmetal's angina because they help relax the coronary arteries and prevent spasm. - **Beta-blockers** are generally avoided or used with caution in Prinzmetal's angina as they can potentially worsen coronary artery spasm.

Q: Which of the following ECG features are characteristic of ventricular tachycardia?

Bizarre QRS complexes. ### Original Explanation ***Bizarre QRS complexes*** - In **ventricular tachycardia (VT)**, the electrical impulse originates from the ventricles, bypassing the normal conduction system [1]. - This leads to **aberrant ventricular activation**, resulting in **wide** and **unusual-looking QRS complexes** [1]. *Presence of AV dissociation [fusion beats]* - While **AV dissociation** can be present in VT, it is **not a universal characteristic** and is often seen in other wide complex tachycardias as well [1]. - **Fusion beats** are a specific type of AV dissociation where a ventricular and supraventricular impulse simultaneously activate the ventricles, which reinforces the diagnosis of VT; however, bizarre QRS complexes are a more direct visual indicator of ventricular origin [1]. *Prolonged duration of QRS complexes* - A prolonged QRS duration (typically **>0.12 seconds**) is characteristic of **wide complex tachycardias**, including VT [1]. - However, the term "bizarre" goes beyond simple prolongation to describe the **unusual morphology and irregular shapes** that are highly suggestive of a ventricular origin [1]. *P pulmonale* - **P pulmonale** refers to a **tall, peaked P wave** in leads II, III, and aVF, indicative of **right atrial enlargement**. - This finding is associated with conditions like **pulmonary hypertension** or **pulmonary embolism** and has no direct relevance to the diagnosis of ventricular tachycardia.

Q: Which of the following is NOT a feature of aortic stenosis?

Pressure in the aorta is the same as in the left ventricle. ***Pressure in the aorta is the same as in the left ventricle*** - In **aortic stenosis**, there is a significant pressure gradient across the aortic valve during systole [2], meaning the **left ventricular pressure** is much higher than the **aortic pressure** to overcome the narrowed opening. - If the pressures were the same, it would indicate an unimpeded flow, suggesting the absence of significant stenosis. *Presence of ejection systolic murmur* - An **ejection systolic murmur** is a classic auscultatory finding in aortic stenosis, resulting from turbulent blood flow across the narrowed valve during systole [2]. [1] - This murmur is typically heard best at the **right upper sternal border** and radiates to the carotid arteries [2]. *Presence of pulsus tardus* - **Pulsus tardus** (or pulsus parvus et tardus) refers to a pulse that is weak (parvus) and delayed (tardus), which is characteristic of significant aortic stenosis [2]. - This occurs because the left ventricle ejects blood slowly and with reduced peak velocity into the aorta due to the **obstruction** at the valve. *Congestive heart failure* - **Congestive heart failure (CHF)** is a common complication of severe aortic stenosis. - The increased afterload on the left ventricle leads to **left ventricular hypertrophy** and eventual dysfunction, causing symptoms such as dyspnea, fatigue, and edema [1].

Q: In patients with inferior wall myocardial infarction, reciprocal changes in ECG are typically observed in which of the following leads?

aVL. aVL - In an **inferior wall MI**, the inferior leads (II, III, aVF) show **ST elevation**, while the **anterior-inferior leads**, particularly **aVL**, often show **reciprocal ST depression** [1]. - This reciprocal change indicates **ischemia** in an area opposite to the primary infarction, reflecting the electrical opposition of the injured myocardial regions [3]. *I* - Lead I is a **lateral lead** and typically does not show significant reciprocal changes in inferior wall myocardial infarction. - While it may sometimes show minor changes, **aVL** is more characteristic for reciprocal changes in this context due to its superior orientation. *II* - Lead II is an **inferior lead** and would show primary signs of an **inferior wall MI**, such as **ST elevation**, not reciprocal changes [2]. - Reciprocal changes are seen in leads electrically opposite to the area of infarction. *III* - Lead III is also an **inferior lead** and would display primary **ST elevation** during an inferior wall MI [2]. - It does not show reciprocal changes as it is directly involved in sensing the electrical activity of the infarcted inferior wall.

Q: 38 yr old patient with high risk of coronary artery disease and hypertension, which of the following antihypertensive drugs will be suitable as a first line treatment for this patient?

ACE inhibitors. ### ACE inhibitors - **ACE inhibitors** are particularly suitable as first-line treatment for patients with hypertension and a high risk of **coronary artery disease (CAD)** because they have proven benefits in **cardiovascular protection** and **mortality reduction** [1]. - They improve **endothelial function** and can prevent **cardiac remodeling**, which is crucial in managing high-risk cardiovascular patients [4]. ### Calcium channel blockers - While effective for hypertension, **calcium channel blockers** do not offer the same level of **cardioprotection** in high-risk CAD patients as ACE inhibitors [1]. - They primarily act as **vasodilators** but lack the direct benefits on cardiac remodeling and atherosclerosis progression seen with ACE inhibitors. ### Beta-adrenergic blockers - **Beta-blockers** are generally not recommended as first-line monotherapy for essential hypertension unless there are specific compelling indications like **post-myocardial infarction** or **heart failure** [5]. - Their routine use as initial therapy for uncomplicated hypertension, especially in high-risk CAD patients without a recent event, is less favored compared to ACE inhibitors. ### Diuretics - **Diuretics**, particularly **thiazide diuretics**, are effective in lowering blood pressure and are often used, especially in elderly patients or those with salt sensitivity [3]. - However, for patients with high CAD risk, ACE inhibitors generally provide superior **cardiovascular benefit** beyond just blood pressure reduction, including preventing adverse cardiac events [2].

Question 1

Levine sign is seen in

Accepted Answer

Acute Myocardial Infarction

Answer

Esophageal spasm

Answer

Aortic dissection

Answer

Pulmonary embolism

Question 2

HOCM is common in which age group?

Accepted Answer

20 - 40 years

Answer

10 - 30 years

Answer

30 - 50 years

Answer

40 - 60 years

Question 3

The most common reentrant tachycardia associated with WPW syndrome is

Accepted Answer

Orthodromic atrioventricular reentry

Answer

Antidromic atrioventricular reentry

Answer

Rapidly conducting atrial fibrillation

Answer

None of the options

Question 4

In a clinical context, the most common toxin causing Dilated Cardiomyopathy is:

Accepted Answer

Alcohol

Answer

Chemotherapeutic agents

Answer

Heavy metal

Answer

Occupational exposure

Question 5

Ejection click of pulmonary stenosis is better heard in

Accepted Answer

Inspiration

Answer

Patient bending forward

Answer

Patient lying in left lateral position

Answer

Expiration

Question 6

Which of the following statements is true about Prinzmetal's angina?

Accepted Answer

May present at rest

Answer

Occurs due to atherosclerotic obstruction of coronary arteries

Answer

It typically occurs during exercise

Answer

Beta-blockers are the first-line treatment for Prinzmetal's angina.

Question 7

Which of the following ECG features are characteristic of ventricular tachycardia?

Accepted Answer

Bizarre QRS complexes

Answer

Presence of AV dissociation [fusion beats]

Answer

Prolonged duration of QRS complexes

Answer

P pulmonale

Question 8

Which of the following is NOT a feature of aortic stenosis?

Accepted Answer

Pressure in the aorta is the same as in the left ventricle

Answer

Presence of pulsus tardus

Answer

Presence of ejection systolic murmur

Answer

Congestive heart failure

Question 9

In patients with inferior wall myocardial infarction, reciprocal changes in ECG are typically observed in which of the following leads?

Accepted Answer

aVL

Answer

I

Answer

II

Answer

III

Question 10

38 yr old patient with high risk of coronary artery disease and hypertension, which of the following antihypertensive drugs will be suitable as a first line treatment for this patient?

Accepted Answer

ACE inhibitors

Answer

Calcium channel blockers

Answer

Beta-adrenergic blockers

Answer

Diuretics

Cardiology — MCQs

Cardiology — MCQs

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