Cardiology Practice Questions

Q: Murmur heard in aortic stenosis

Right 2nd intercostal, high pitch systolic ejection murmur. ***Right 2nd intercostal, high pitch systolic ejection murmur*** - The murmur of **aortic stenosis** is classically heard loudest at the **right second intercostal space** (aortic area) due to turbulent flow through the stenosed aortic valve. - It is a **high-pitched, systolic ejection murmur** with a crescendo-decrescendo pattern, often radiating to the carotid arteries [2]. *Apex, low pitch murmur associated with mitral valve issues* - A murmur heard at the **apex** that is low-pitched typically suggests **mitral stenosis**, which is a diastolic rumble, not an aortic stenosis murmur [1]. - This option refers to characteristics associated with **mitral valve disease**, not aortic stenosis. *Pan-systolic murmur, high pitch murmur associated with mitral regurgitation* - A **pan-systolic murmur** is characteristic of conditions like **mitral regurgitation** or tricuspid regurgitation, where blood flows throughout the entire systole [3]. - While it can be high-pitched, its pan-systolic nature and association with mitral regurgitation make it distinct from aortic stenosis. *Left Sternal area, murmur indicating mitral regurgitation* - Murmurs heard primarily at the **left sternal area** can indicate various conditions, but this option specifically points to **mitral regurgitation**. - **Mitral regurgitation** is better heard at the apex and usually radiates to the axilla, and the description does not fit the typical presentation of aortic stenosis [3].

Q: In the context of ventricular tachycardia, what do extra systoles appear as on an electrocardiogram (ECG)?

QRS complex. ***QRS complex*** - Extra systoles, particularly **premature ventricular contractions (PVCs)**, originate in the ventricles and result in a **wide and bizarre QRS complex** on an ECG [2]. - The QRS complex represents **ventricular depolarization**, and in ventricular tachycardia, the *ventricular activity* dominates the ECG tracing [2]. *P wave* - The **P wave** represents **atrial depolarization** and is typically either absent or dissociated from the QRS complex in ventricular tachycardia [1], [2]. - Its presence or absence helps differentiate supraventricular from ventricular arrhythmias. *T wave* - The **T wave** represents **ventricular repolarization**, which typically follows the QRS complex [1]. - While it will be present, it often appears abnormal or discordant in ventricular tachycardia due to the altered ventricular depolarization. *R wave* - The **R wave** is part of the QRS complex, specifically the first positive deflection. - While an R wave is present within the QRS complex of an extrasystole, referring to the entire **QRS complex** is more accurate as it encompasses the complete ventricular depolarization in an abnormal morphology.

Q: Which of the following statements about atrial myxomas is correct?

Most commonly found in the Left Atrium.. ***Most commonly found in the Left Atrium.*** - **Atrial myxomas** are typically found in the **left atrium** (approximately 75-80% of cases), often attached to the **interatrial septum** near the fossa ovalis. - Their presence in the left atrium can lead to **obstruction of the mitral valve**, causing symptoms mimicking mitral stenosis [1]. *More prevalent in males.* - **Atrial myxomas** are more common in **females** than males, with a female-to-male ratio of approximately 2:1. - This higher prevalence in women is a consistent finding in epidemiological studies of cardiac myxomas [2]. *Most myxomas are hereditary.* - The vast majority of **atrial myxomas** are **sporadic** (non-hereditary), accounting for about 90-95% of cases. - A small percentage (5-10%) are part of a familial syndrome known as **Carney complex**, which is an autosomal dominant disorder. *Distant metastasis is commonly observed.* - **Atrial myxomas** are generally **benign tumors** and do not metastasize to distant sites. - While they can embolize fragments, leading to systemic effects, these are not true metastases.

Q: A patient with first-degree heart block presents with dizziness. What is the most appropriate management for this patient?

Observation and investigation of other causes. ***Observation and investigation of other causes*** - **First-degree heart block** is usually **asymptomatic** and benign, rarely causing dizziness or other symptoms. - The dizziness experienced by the patient is likely due to another underlying condition and warrants **further investigation** rather than direct intervention for the heart block [2], [3]. *Pacemaker insertion* - **Pacemaker insertion** is reserved for **symptomatic heart blocks** of higher degrees (e.g., Mobitz II or complete heart block) or those with significant hemodynamic compromise [1]. - Given that first-degree heart block is typically asymptomatic, inserting a pacemaker would be an **overtreatment** and unnecessary for this condition alone. *Isoprenaline* - **Isoprenaline** is a **beta-agonist** that increases heart rate and AV conduction, sometimes used in certain bradyarrhythmias. - However, for first-degree heart block, which is generally benign, pharmacologic intervention with agents like **isoprenaline** is not typically indicated and carries risks of adverse effects [2]. *Atropine* - **Atropine** is an anticholinergic drug used to **increase heart rate** by blocking vagal stimulation of the SA and AV nodes. - While it can improve AV conduction, it is not indicated for **asymptomatic first-degree heart block** or when symptoms like dizziness are unlikely to be directly caused by the block itself.

Q: Duroziez's sign is associated with which of the following conditions?

Aortic Regurgitation. ***Aortic Regurgitation*** - **Duroziez's sign** is a characteristic **systolic and diastolic bruit** heard over the femoral artery, indicative of significant **aortic regurgitation**. [1], [2] - This sign occurs due to the rapid antegrade and retrograde flow of blood during systole and diastole, respectively, caused by the incompetent aortic valve. [2] *Tricuspid Regurgitation* - **Tricuspid regurgitation** is primarily associated with **holosystolic murmur** best heard at the left lower sternal border, often increasing with inspiration (Carvallo's sign). - It does not produce arterial bruits like Duroziez's sign. *Pericardial effusion* - **Pericardial effusion** is characterized by the accumulation of fluid in the pericardial sac, which can lead to distant heart sounds, **pulsus paradoxus**, and electrical alternans on ECG. - It does not involve vascular bruits in peripheral arteries. *Mitral Stenosis* - **Mitral stenosis** classically presents with a **diastolic rumble** and an **opening snap**, typically heard at the apex. - It is a left-sided heart valve condition that does not cause peripheral arterial bruits.

Q: In the context of chest pain evaluation, which is the best way to differentiate between stable angina and NSTEMI?

Cardiac-biomarker. **Cardiac-biomarker** - **Cardiac biomarkers**, particularly **troponin**, are crucial for differentiating between **unstable angina** and **NSTEMI** [1], [2]. In NSTEMI, there is evidence of **myocardial necrosis**, leading to elevated cardiac troponins [2]. - **Stable angina** and **unstable angina** do not involve myocardial necrosis, so troponin levels remain within the normal range [1]. *ECG* - While an **ECG** is essential in the initial assessment of chest pain, it may show **non-specific changes** in both **unstable angina** and **NSTEMI**, such as T-wave inversions or ST-segment depression [2]. - The definitive distinction of **NSTEMI** often relies on **sequential biomarker measurements**, as ECG changes alone may not be sufficient for diagnosis or differentiation from unstable angina [2]. *Trans thoracic Echocardiography* - **Echocardiography** can show **regional wall motion abnormalities** that might suggest ischemia, but these findings are not specific enough to differentiate between **stable angina** and **NSTEMI** immediately. - It is more useful for assessing **ventricular function**, identifying **valvular disease**, or detecting other causes of chest pain, rather than acute differentiation of coronary syndromes. *Multi uptake gated Acquisition scan* - A **MUGA scan** assesses **left ventricular ejection fraction** and wall motion, primarily used in evaluating global cardiac function and monitoring cardiotoxicity from chemotherapy. - It is **not a first-line diagnostic tool** for differentiating between acute coronary syndromes like **stable angina** and **NSTEMI** because it does not directly detect acute myocardial injury.

Q: Becks triad is seen in

Cardiac tamponade. ***Cardiac tamponade*** - **Beck's triad** is a set of three clinical signs associated with acute cardiac tamponade: **hypotension**, **jugular venous distension (JVD)**, and **muffled heart sounds**. [1] - These signs result from the accumulation of fluid in the pericardial sac, which compresses the heart and impairs its ability to fill. [1] *Constrictive pericarditis* - While it can manifest with JVD and signs of right heart failure, **muffled heart sounds** and acute **hypotension** as part of Beck's triad are not typical for its chronic nature. [2] - It involves a rigid, fibrotic pericardium that restricts diastolic filling, often with a **pericardial knock** rather than muffled sounds. [2] *Restrictive cardiomyopathy* - This condition involves impaired ventricular relaxation and filling, leading to signs of heart failure, including JVD. [3] - However, it does not typically present with the acute, severe **hypotension** or **muffled heart sounds** characteristic of cardiac tamponade. [3] *None of the options* - This option is incorrect as cardiac tamponade is the condition associated with Beck's triad.

Q: Digitalis is used in mitral stenosis to control the ventricular rate when the patient develops which condition?

Atrial fibrillation. ***Atrial fibrillation*** - **Digitalis** (digoxin) is effective in **slowing the ventricular rate** in atrial fibrillation by increasing vagal tone and prolonging the refractory period of the AV node. - In **mitral stenosis**, an uncontrolled rapid ventricular rate due to atrial fibrillation can significantly reduce cardiac output and worsen symptoms. *Right ventricular failure* - While digitalis can improve contractility, its primary role in **RV failure** is not rate control; diuretics and afterload reduction are more commonly used. - A patient with isolated right ventricular failure due to mitral stenosis would not directly benefit from digitalis for rate control. *Acute pulmonary edema* - **Acute pulmonary edema** requires rapid diuresis, oxygen, and vasodilators to reduce preload and afterload. - Digitalis has a slower onset of action and is not the first-line treatment for acute pulmonary edema, especially if the cause is not related to a rapid ventricular rate. *Myocarditis* - **Myocarditis** is an inflammation of the heart muscle, and digitalis is generally avoided due to concerns about potentially worsening arrhythmias and myocardial damage in an inflamed heart. - Treatment for myocarditis focuses on supportive care and addressing the underlying cause, not rate control with digitalis unless specific arrhythmias develop.

Q: Which of the following is not recommended for patients with coronary artery disease?

Vitamin E. ***Vitamin E*** - **Vitamin E supplements** are generally not recommended for patients with coronary artery disease (CAD) based on current evidence. Some studies suggest a potential link between high doses of vitamin E and an increased risk of **heart failure** or even **overall mortality**. - There is no convincing evidence that vitamin E supplements provide cardiovascular benefits in patients with established CAD, and they may interfere with the efficacy of other beneficial medications like **statins**. *Daily exercise* - **Regular physical activity** is a cornerstone of CAD management, improving cardiovascular fitness, reducing blood pressure, and aiding in weight control [1]. - It helps in preventing disease progression and reducing the risk of future cardiovascular events when performed under appropriate medical guidance [1]. *Potassium* - Maintaining adequate **potassium levels** is crucial for patients with CAD, especially those on diuretics, as it helps regulate **blood pressure** and prevents **cardiac arrhythmias**. - Dietary sources of potassium (fruits, vegetables) are preferred, and supplementation may be necessary for those with deficiencies, but always under medical supervision. *Statins* - **Statins** are a class of medications widely recommended for patients with CAD due to their ability to significantly lower **LDL cholesterol** levels and reduce cardiovascular events [1]. - They stabilize **atherosclerotic plaques** and reduce inflammation, playing a critical role in secondary prevention of heart attacks and strokes [1].

Q: Among the following emerging risk factors, which is considered the most important predisposing factor for coronary artery disease?

↑ Lipoprotein(a). ***↑ Lipoprotein(a)*** - **Lipoprotein(a) [Lp(a)]** is an **independent and causal risk factor** for **Coronary Artery Disease (CAD)**, with its elevated levels strongly associated with increased cardiovascular risk. - Its proatherogenic and prothrombotic properties, attributed to its structural similarity to **LDL** and **plasminogen**, make it a particularly potent emerging risk factor. *Homocysteinemia* - While **elevated homocysteine levels** are associated with increased risk of **atherosclerosis** and **thrombosis**, the evidence for it as an independent causal risk factor for **CAD** is weaker compared to Lp(a). - Its contribution to **CAD** risk is often considered in the context of other traditional risk factors and may be influenced by nutrient deficiencies like **folate** and **B vitamins**. *↑ Fibrinogen* - **Elevated fibrinogen levels** are a marker of **inflammation** and are associated with an increased risk of **CAD** due to its role in **blood coagulation** and **platelet aggregation** [1]. - However, fibrinogen is considered more of a **risk marker** and a component of the inflammatory response rather than a primary, independent causal factor like Lp(a). *↑ plasminogen activator inhibitors 1* - **Elevated plasminogen activator inhibitor-1 (PAI-1)** levels promote a **prothrombotic state** by inhibiting **fibrinolysis**, which can contribute to the development of **CAD**. - While important in the pathophysiology of **thrombosis**, it is generally considered a downstream mediator in the context of vascular injury and inflammation, rather than the most significant emerging predisposing factor compared to Lp(a).

Question 1

Murmur heard in aortic stenosis

Accepted Answer

Right 2nd intercostal, high pitch systolic ejection murmur

Answer

Apex, low pitch murmur associated with mitral valve issues

Answer

Pan-systolic murmur, high pitch murmur associated with mitral regurgitation

Answer

Left Sternal area, murmur indicating mitral regurgitation

Question 2

In the context of ventricular tachycardia, what do extra systoles appear as on an electrocardiogram (ECG)?

Accepted Answer

QRS complex

Answer

P wave

Answer

T wave

Answer

R wave

Question 3

Which of the following statements about atrial myxomas is correct?

Accepted Answer

Most commonly found in the Left Atrium.

Answer

More prevalent in males.

Answer

Most myxomas are hereditary.

Answer

Distant metastasis is commonly observed.

Question 4

A patient with first-degree heart block presents with dizziness. What is the most appropriate management for this patient?

Accepted Answer

Observation and investigation of other causes

Answer

Pacemaker insertion

Answer

Isoprenaline

Answer

Atropine

Question 5

Duroziez's sign is associated with which of the following conditions?

Accepted Answer

Aortic Regurgitation

Answer

Pericardial effusion

Answer

Tricuspid Regurgitation

Answer

Mitral Stenosis

Question 6

In the context of chest pain evaluation, which is the best way to differentiate between stable angina and NSTEMI?

Accepted Answer

Cardiac-biomarker

Answer

ECG

Answer

Trans thoracic Echocardiography

Answer

Multi uptake gated Acquisition scan

Question 7

Becks triad is seen in

Accepted Answer

Cardiac tamponade

Answer

Restrictive cardiomyopathy

Answer

Constrictive pericarditis

Answer

None of the options

Question 8

Digitalis is used in mitral stenosis to control the ventricular rate when the patient develops which condition?

Accepted Answer

Atrial fibrillation

Answer

Right ventricular failure

Answer

Acute pulmonary edema

Answer

Myocarditis

Question 9

Which of the following is not recommended for patients with coronary artery disease?

Accepted Answer

Vitamin E

Answer

Potassium

Answer

Statins

Answer

Daily exercise

Question 10

Among the following emerging risk factors, which is considered the most important predisposing factor for coronary artery disease?

Accepted Answer

↑ Lipoprotein(a)

Answer

Homocysteinemia

Answer

↑ Fibrinogen

Answer

↑ plasminogen activator inhibitors 1

Cardiology — MCQs

Cardiology — MCQs

On this page

Practice by Chapter

Want unlimited practice?