Cardiology Practice Questions

Q: What is a characteristic finding in athletes' hearts, also known as athletic syndrome?

Increased amplitude of QRS. ***Increased amplitude of QRS*** - In **athletes' hearts**, the heart muscle (myocardium) undergoes physiological adaptations, including **left ventricular hypertrophy**, which leads to an **increased amplitude of the QRS complex** on an ECG. - This is a normal and beneficial adaptation that enhances cardiac output and efficiency during exercise. *Bradycardia* - While **bradycardia** (a slower heart rate) is very common in athletes due to increased **vagal tone** and improved cardiac efficiency, it is not the most direct characteristic finding *on an ECG* reflecting the structural changes of athletic heart syndrome. - Bradycardia is a rate finding, not a waveform amplitude change reflecting myocardial mass. *Decreased QT interval* - A **decreased QT interval** is not a typical characteristic of an athlete's heart; in fact, there is usually no significant change or a slight prolongation due to bradycardia, but it remains within normal limits. - A pathologically short QT interval can indicate specific genetic channelopathies, which are unrelated to athletic adaptation. *U-waves* - **U-waves** are small positive deflections sometimes seen after the T wave, often associated with **bradycardia** or **hypokalemia**. - While athletes can have bradycardia, U-waves are not a consistent or defining feature of an athlete's heart syndrome itself, and their presence can also indicate other conditions.

Q: Tall T waves on ECG are seen in:

Hyperkalemia. ***Hyperkalemia*** - **Tall, peaked T waves** are a hallmark ECG finding in early to moderate **hyperkalemia**, reflecting altered repolarization due to elevated extracellular potassium [1]. - As potassium levels rise further, other ECG changes may include a **prolonged PR interval**, **widened QRS complex**, and ultimately a **sine wave pattern**, leading to ventricular arrhythmias [1]. *Hypokalemia* - This condition is typically associated with **flattened or inverted T waves**, prominent **U waves**, and a **prolonged QT interval** on the ECG [1]. - The ECG changes in hypokalemia reflect delayed repolarization and increased myocardial instability [1]. *Hypercalcemia* - **Hypercalcemia** is characterized by a **shortened QT interval** on the ECG due to accelerated ventricular repolarization. - T waves, if affected, are usually not tall or peaked but may be wider or slightly less prominent. *Hypocalcemia* - **Hypocalcemia** typically leads to a **prolonged QT interval** on the ECG, primarily due to a lengthened ST segment. - While it can manifest with various T wave morphologies, it does not typically cause the characteristic tall, peaked T waves seen in hyperkalemia.

Q: A 45-year-old patient presents with progressive dyspnea, orthopnea, and bilateral pedal edema. On examination, there is elevated JVP, S3 gallop, and hepatomegaly. What is the most likely underlying pathophysiology?

HALE. ***HALE*** - This acronym stands for **Heart-failure Associated Lung Edema**. The symptoms of **progressive dyspnea**, **orthopnea**, **bilateral pedal edema**, **elevated JVP**, **S3 gallop**, and **hepatomegaly** are classic signs of **congestive heart failure** leading to fluid overload and pulmonary congestion [1]. - The pathophysiology involves the heart's inability to pump blood effectively, causing a buildup of pressure in the pulmonary and systemic circulations, leading to the observed symptoms [1]. *DALEY* - This is not a recognized acronym in medical pathophysiology. The symptoms presented are strongly indicative of a specific cardiovascular condition. - There is no clinical scenario where "DALEY" would accurately describe the underlying pathophysiology of dyspnea, edema, and heart failure signs. *OALY* - This is not a recognized acronym in medical pathophysiology. The presented clinical picture requires a well-established and specific pathophysiological explanation. - Using an unrecognized term would not provide an accurate or helpful description of the patient's condition. *None of the options* - The acronym HALE (Heart-failure Associated Lung Edema) accurately captures the core pathophysiology evident from the patient's symptoms and signs. - Given the strong clinical presentation of congestive heart failure with pulmonary and systemic congestion, one of the provided options *does* accurately describe the situation.

Q: All of the following statements about the third heart sound (S3) are true, except:

Seen in Constrictive Pericarditis. ***Seen in Constrictive Pericarditis*** - While constrictive pericarditis can lead to a diastolic sound, it's typically a **pericardial knock**, which is sharper and occurs earlier than an S3, due to abrupt halting of ventricular filling. - A true S3 is a low-pitched sound caused by turbulent blood flow into an overly compliant or volume-overloaded ventricle, which is not the primary mechanism in constrictive pericarditis. *Occurs due to rapid filling of the ventricles during early diastole.* - The S3 heart sound is precisely caused by the **rapid inflow of blood** into a dilated or poorly compliant ventricle during the early, rapid filling phase of diastole [1]. - This rapid distension causes vibrations in the ventricular wall, audible as S3, and is often associated with conditions causing **volume overload** or **ventricular dysfunction**. *Seen in Atrial Septal Defect (ASD)* - Patients with a large ASD have increased blood flow through the tricuspid valve, leading to **right ventricular volume overload** [2]. - This increased volume can cause an **S3** sound, particularly a **right ventricular S3**, due to rapid filling of the overloaded right ventricle [2]. *Seen in Ventricular Septal Defect (VSD)* - A significant VSD leads to a **left-to-right shunt**, increasing blood flow to the pulmonary circulation and subsequently returning to the left atrium and left ventricle. - This **left ventricular volume overload** can result in an audible **left ventricular S3**, reflecting rapid filling of the dilated left ventricle.

Q: What is the most common cause of dissecting hematoma?

Hypertension. ***Hypertension*** - **Chronic hypertension** is the most frequent cause of dissecting hematoma (aortic dissection) due to the constant high pressure stressing the arterial wall [1]. - It leads to **medial degeneration** and predisposition to intimal tear, allowing blood to enter the arterial wall [1]. *Marfan syndrome* - While Marfan syndrome is a significant risk factor for aortic dissection due to **connective tissue weakness** (cystic medial necrosis), it is much less common than hypertension [1]. - It primarily affects younger individuals with a genetic predisposition to **fibrillin-1 mutations**. *Iatrogenic causes* - These include complications from medical procedures like **cardiac catheterization** or surgery [1]. - Though a possible cause, iatrogenic dissection is relatively rare compared to spontaneous dissection due to hypertension [1]. *Kawasaki disease* - Kawasaki disease primarily causes **coronary artery aneurysms** in children. - It is not a common cause of aortic dissecting hematoma in adults.

Q: Which components of cigarette smoke are known to contribute to coronary artery disease?

Nicotine, carbon monoxide, and tar. ***Nicotine, carbon monoxide, and tar*** - **Nicotine** directly affects the cardiovascular system by increasing **heart rate**, **blood pressure**, and causing **vasoconstriction**, as well as promoting atherogenesis [2]. - **Carbon monoxide** binds to hemoglobin with higher affinity than oxygen, forming **carboxyhemoglobin**, which reduces oxygen delivery to tissues, leading to **endothelial damage** and contributing to atherosclerosis [1]. - **Tar** contains various **carcinogens** and toxic chemicals that contribute to inflammation, oxidative stress, and lipid peroxidation, all of which are implicated in the development and progression of **atherosclerosis**. *Carbon monoxide and tar* - While both contribute significantly, this option **omits nicotine**, which is a major contributor to the cardiovascular effects of smoking. - Nicotine's direct impact on **vasoconstriction** and **atherogenesis** is a critical factor in coronary artery disease [2]. *Carbon dioxide* - **Carbon dioxide** is a product of respiration and combustion but is not considered a primary direct contributor to the pathogenesis of **coronary artery disease** from cigarette smoke in the same way as nicotine, carbon monoxide, and tar. - Its presence in smoke primarily relates to its role in **respiratory physiology** rather than direct vascular damage. *Tar and nicotine* - This option correctly identifies **tar** and **nicotine** as contributors but **omits carbon monoxide**, which plays a crucial role in reducing oxygen-carrying capacity and directly damaging the endothelium [1]. - The impact of **carbon monoxide** on cardiac oxygen supply is a significant mechanism in smoking-related cardiovascular disease [1].

Q: Which of the following complications is commonly associated with mitral valve prolapse?

Infective endocarditis. Mitral valve prolapse (MVP) involves myxomatous degeneration of the mitral valve leaflets, which can create a rough surface predisposing to bacterial adhesion and subsequent infective endocarditis [1]. While the overall risk is low, patients with MVP and accompanying mitral regurgitation or thickened leaflets are at higher risk [1]. Patients with valvular heart disease are generally susceptible to bacterial endocarditis, often associated with procedures or dental hygiene [2]. Stroke - Although MVP can sometimes be associated with embolic events (e.g., from thrombi forming on the prolapsing valve), stroke is not considered a commonly associated complication. - The risk of stroke is generally higher in MVP patients with concomitant atrial fibrillation or other cardiovascular risk factors. Mitral stenosis - Mitral valve prolapse is characterized by the displacement of mitral valve leaflets into the left atrium during systole, which can lead to mitral regurgitation [3], not stenosis. - Mitral stenosis involves narrowing of the mitral valve orifice, usually due to rheumatic fever, which is a different pathophysiology [4]. Ventricular arrhythmia - While palpitations (often benign supraventricular ectopy) are common in MVP, clinically significant ventricular arrhythmias are less common. - Severe ventricular arrhythmias are more typically seen with significant underlying myocardial disease or severe mitral regurgitation causing left ventricular dysfunction.

Q: A patient presents with intense chest pain of 2 hours duration. ECG shows ST depression in leads I and V1 to V4. There is associated T inversion and CPK-MB is elevated. Which of the following should be included in his management?

All of the options. ***All of the options*** - This patient presents with symptoms and ECG findings consistent with an **ST-elevation myocardial infarction (STEMI)** or **non-ST-elevation myocardial infarction (NSTEMI)**, given the ST depression and T-wave inversions with elevated CPK-MB [4]. - All listed medications (aspirin, IV metoprolol, and nitroglycerine drip) are standard and essential components of early management used to stabilize the patient, reduce myocardial oxygen demand, and prevent further cardiac events [1]. *Aspirin* - **Aspirin** is an antiplatelet agent used to inhibit platelet aggregation and prevent further thrombus formation in acute coronary syndromes [2]. - It is critical for immediate administration in suspected myocardial infarction to reduce mortality and recurrent ischemic events. *IV metoprolol* - **IV metoprolol** (a beta-blocker) reduces myocardial oxygen demand by decreasing heart rate, contractility, and blood pressure [3]. - It is indicated in acute coronary syndromes unless contraindicated, as it can limit infarct size and reduce the risk of arrhythmias. *Nitroglycerine drip* - The **nitroglycerine drip** is a vasodilator that reduces preload and dilates coronary arteries, improving myocardial blood flow and relieving ischemic chest pain [2]. - It is particularly useful for persistent chest pain and helps reduce myocardial oxygen demand.

Q: DASH stands for:

Dietary approach to stop hypertension. DASH stands for: ***Dietary approach to stop hypertension*** - DASH is an acronym that describes a specific dietary pattern designed to help **prevent and control hypertension** [1]. - The diet emphasizes fruits, vegetables, whole grains, and lean proteins while limiting saturated and total fats, cholesterol, and sodium [1]. *Dietary approach to stop hemorrhage* - This option is incorrect as DASH specifically targets **blood pressure regulation**, not the prevention or treatment of hemorrhage. - While diet can influence clotting factors, the DASH diet's primary focus is on cardiovascular health through blood pressure control. *Direct approach to surgery of hernia* - This option is completely unrelated to the acronym DASH. DASH refers to a **dietary intervention**, not a surgical procedure or an approach to hernia repair. - The acronym has no medical relevance in the context of surgery. *Dietary approach to stop hemolysis* - This option is incorrect, as hemolysis refers to the **destruction of red blood cells**, which is not the primary target of the DASH diet. - While overall nutrition is important for red blood cell health, DASH is specifically formulated to lower blood pressure.

Q: All the following drugs are to be avoided in hypertrophic cardiomyopathy except beta blockers.

Beta blockers. ***Beta blockers*** - **Beta-blockers** are a cornerstone in the management of hypertrophic cardiomyopathy because they reduce **heart rate**, improve diastolic filling, and decrease the **outflow tract obstruction**. - They alleviate symptoms such as **chest pain** and **dyspnea** by decreasing myocardial oxygen demand and contractility. *Diuretics* - **Diuretics** should generally be avoided in hypertrophic cardiomyopathy as they can reduce **preload**, which exacerbates the **left ventricular outflow tract obstruction**. - A decrease in ventricular volume caused by diuretics can worsen symptoms and increase the risk of **syncope**. *Digitalis* - **Digitalis (digoxin)** is contraindicated in hypertrophic cardiomyopathy because its **positive inotropic effect** increases myocardial contractility. - This increased contractility can worsen the **left ventricular outflow tract obstruction** and exacerbate symptoms. *Nitrates* - **Nitrates** cause systemic **vasodilation**, which reduces both preload and afterload. - The reduction in **preload** can worsen **left ventricular outflow tract obstruction**, making nitrates generally contraindicated in HCM.

Question 1

What is a characteristic finding in athletes' hearts, also known as athletic syndrome?

Accepted Answer

Increased amplitude of QRS

Answer

Decreased QT interval

Answer

U-waves

Answer

Bradycardia

Question 2

Tall T waves on ECG are seen in:

Accepted Answer

Hyperkalemia

Answer

Hypokalemia

Answer

Hypercalcemia

Answer

Hypocalcemia

Question 3

A 45-year-old patient presents with progressive dyspnea, orthopnea, and bilateral pedal edema. On examination, there is elevated JVP, S3 gallop, and hepatomegaly. What is the most likely underlying pathophysiology?

Accepted Answer

HALE

Answer

DALEY

Answer

OALY

Answer

None of the options

Question 4

All of the following statements about the third heart sound (S3) are true, except:

Accepted Answer

Seen in Constrictive Pericarditis

Answer

Seen in Atrial Septal Defect (ASD)

Answer

Seen in Ventricular Septal Defect (VSD)

Answer

Occurs due to rapid filling of the ventricles during early diastole.

Question 5

What is the most common cause of dissecting hematoma?

Accepted Answer

Hypertension

Answer

Marfan syndrome

Answer

Iatrogenic causes

Answer

Kawasaki disease

Question 6

Which components of cigarette smoke are known to contribute to coronary artery disease?

Accepted Answer

Nicotine, carbon monoxide, and tar

Answer

Carbon monoxide and tar

Answer

Carbon dioxide

Answer

Tar and nicotine

Question 7

Which of the following complications is commonly associated with mitral valve prolapse?

Accepted Answer

Infective endocarditis

Answer

Ventricular arrhythmia

Answer

Stroke

Answer

Mitral stenosis

Question 8

A patient presents with intense chest pain of 2 hours duration. ECG shows ST depression in leads I and V1 to V4. There is associated T inversion and CPK-MB is elevated. Which of the following should be included in his management?

Accepted Answer

All of the options

Answer

IV metoprolol

Answer

Aspirin

Answer

Nitroglycerine drip

Question 9

DASH stands for:

Accepted Answer

Dietary approach to stop hypertension

Answer

Direct approach to surgery of hernia

Answer

Dietary approach to stop hemolysis

Answer

Dietary approach to stop hemorrhage

Question 10

All the following drugs are to be avoided in hypertrophic cardiomyopathy except beta blockers.

Accepted Answer

Beta blockers

Answer

Diuretics

Answer

Digitalis

Answer

Nitrates

Cardiology — MCQs

Cardiology — MCQs

On this page

Practice by Chapter

Want unlimited practice?