Cardiology Practice Questions

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: A 40-year-old woman who had several episodes of rheumatic fever as a child, is currently afebrile and feels well, and has come to a hospital for monitoring echocardiography. Which of the following findings would most likely be seen in this patient's mitral valve?

Fibrous bridging between thickened, calcified leaflets. A history of **rheumatic fever** typically leads to **chronic rheumatic heart disease**, resulting in **thickening and fibrosis of the mitral valve** [1]. The presence of **fibrous bridging** is characteristic of rheumatic valve disease, indicating scarring and adhesion of leaflets [1]. *Irregular beads of calcification in annulus* - This finding is more suggestive of **degenerative calcific changes** rather than changes due to rheumatic heart disease. - In rheumatic fever, the mitral valve typically shows **thickened leaflets** rather than calcification at the annulus [1]. *Large bulky vegetation with adjacent leaflet perforation* - This is indicative of **infective endocarditis**, not rheumatic heart disease, which would not present with bulky vegetations [2]. - Rheumatic heart disease leads to **structural valve dysfunction** without the presence of vegetations [2]. *Ballooning of valve leaflets* - Ballooning (or myxomatous degeneration) is associated with **mitral valve prolapse**, not rheumatic heart disease. - In rheumatic fever, the leaflets are usually **thickened and fused**, rather than ballooned or prolapsed [1].

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.

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: Which vein is most commonly thrombosed?

Long saphenous. ***Long saphenous*** - The **long saphenous vein** is the longest vein in the body and superficial, making it highly susceptible to injury and **thrombosis**. - Its superficial location and numerous **valvular incompetence** contribute to its frequent involvement in conditions like **superficial thrombophlebitis** and **venous insufficiency**. *Short saphenous* - The **short saphenous vein** is less commonly thrombosed compared to the long saphenous vein due to its shorter length and usually less extensive network of tributaries. - While it can be affected by thrombophlebitis, it's generally less prevalent than long saphenous vein involvement. *Both* - Although both veins can be thrombosed, the **long saphenous vein** is statistically more prone to **thrombosis** and related complications due to its anatomical characteristics and frequency of **valvular dysfunction**. - The risk is not equally distributed, with the long saphenous vein having a higher incidence. *Posterior tibial* - The **posterior tibial vein** is a **deep vein**, and deep vein thrombosis (DVT) in this location is a serious condition but is distinct from superficial venous thrombosis [1]. - While it can thrombose, the question refers to the most commonly thrombosed superficial vein, which is the long saphenous.

Q: ECG of a patient shows more than three consecutive premature ventricular contractions (PVC) with a heart rate of less than 100 beats per minute. What is the diagnosis?

Accelerated idioventricular rhythm. ***Accelerated idioventricular rhythm*** - This condition is defined by three or more consecutive **premature ventricular contractions (PVCs)**, with a ventricular rate between **40 and 100 bpm**. The question specifies a heart rate less than 100 bpm, which aligns with this definition. - It often occurs in the setting of **reperfusion** after myocardial infarction or digitalis toxicity, presenting as a wide QRS rhythm that is typically benign and self-limiting [1]. *Ventricular tachycardia with a heart rate >100 bpm* - **Ventricular tachycardia (VT)** is characterized by three or more consecutive **PVCs** with a heart rate greater than 100 bpm [1]. - The patient's heart rate being less than 100 bpm excludes VT as the primary diagnosis [1]. *Rapid ventricular rhythm with chaotic electrical activity* - A rapid ventricular rhythm with **chaotic electrical activity** typically describes **ventricular fibrillation (VF)**, which is a life-threatening arrhythmia [2]. - VF involves disorganized electrical activity and lack of distinct QRS complexes, which is distinct from the structured consecutive PVCs described [2]. *Ventricular tachycardia resolving spontaneously with a heart rate >100 bpm* - While ventricular tachycardia can resolve spontaneously, its definition requires a heart rate **greater than 100 bpm** [1]. - The given heart rate of less than 100 bpm means this is not ventricular tachycardia, even if it were to resolve spontaneously.

Q: Which of the following murmurs increase with a Valsalva maneuver?

Hypertrophic cardiomyopathy. ***Hypertrophic cardiomyopathy*** - The Valsalva maneuver decreases **preload**, leading to a reduction in left ventricular volume and an **increased outflow tract obstruction**. - This increased obstruction accentuates the murmur of hypertrophic cardiomyopathy, making it louder. *MR* - Mitral regurgitation (MR) murmur typically **decreases** or remains unchanged with the Valsalva maneuver due to reduced **venous return** and thus reduced left ventricular preload. - A decrease in preload lessens the volume of blood being regurgitated from the left ventricle into the left atrium. *VSD* - The murmur of a ventricular septal defect (VSD) usually **decreases** during the Valsalva maneuver because of the reduction in **venous return** and consequent decrease in left-to-right shunting. - Decreased systemic vascular resistance relative to pulmonary resistance also plays a role, reducing the pressure gradient for shunting. *AS* - Aortic stenosis (AS) murmur generally **decreases** during the Valsalva maneuver due to decreased **left ventricular volume** and reduced transvalvular flow. - The reduction in preload lessens the blood ejected through the stenotic aortic valve, thereby reducing the intensity of the murmur.

Q: Classification of aortic dissection depends on.

Level of aorta affected. The classification of aortic dissection is primarily based on the **segment of the aorta involved**, typically divided into Stanford and DeBakey classifications [1]. This classification helps determine **management strategies** and prognosis based on the affected aortic region (ascending or descending) [1]. Understanding the classification is crucial for guiding **treatment decisions** and predicting outcomes [1]. The classification is more concerned with **anatomical location** rather than the etiology, such as hypertension or collagen disorders [1].

Q: In which of the following situations is intensive management of diabetes typically avoided?

Diabetes with acute myocardial infarction. Diabetes with acute myocardial infarction - In the setting of **acute myocardial infarction (AMI)**, aggressive **glucose lowering** can increase the risk of **hypoglycemia** and is generally avoided due to potential for worse outcomes [1]. - The primary focus in AMI is on cardiovascular stabilization, and overly tight glycemic control can lead to **metabolic stress** and adverse events, particularly in patients with a high prevalence of cardiovascular disease [1]. *Stable diabetes with no complications* - Patients with **stable diabetes** and no complications are often candidates for **intensive management** to prevent long-term microvascular and macrovascular complications [1]. - The goal is to maintain near-normal glucose levels to reduce the risk of future disease progression [1]. *Diabetes in a well-controlled state* - **Well-controlled diabetes** usually indicates that current management is effective, but further **intensification** might be considered to achieve optimal glycemic targets and minimize long-term risks if there's room for improvement. - This scenario does not inherently contraindicate intensive management, as it could still benefit from fine-tuning to achieve even tighter control without undue risk. *Diabetes with stable renal function post-transplant* - Patients with **diabetes** and stable **renal function post-transplant** often require careful but often intensive diabetes management to preserve graft function and prevent cardiovascular complications. - While medication adjustments are necessary due to altered renal clearance, the goal remains to achieve good glycemic control, potentially through intensive strategies.

Question 1

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 2

A 40-year-old woman who had several episodes of rheumatic fever as a child, is currently afebrile and feels well, and has come to a hospital for monitoring echocardiography. Which of the following findings would most likely be seen in this patient's mitral valve?

Accepted Answer

Fibrous bridging between thickened, calcified leaflets

Answer

Ballooning of valve leaflets

Answer

Irregular beads of calcification in annulus

Answer

Large bulky vegetation with adjacent leaflet perforation

Question 3

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

Accepted Answer

Beta blockers

Answer

Diuretics

Answer

Digitalis

Answer

Nitrates

Question 4

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 5

Which vein is most commonly thrombosed?

Accepted Answer

Long saphenous

Answer

Posterior tibial

Answer

Short saphenous

Answer

Both

Question 6

ECG of a patient shows more than three consecutive premature ventricular contractions (PVC) with a heart rate of less than 100 beats per minute. What is the diagnosis?

Accepted Answer

Accelerated idioventricular rhythm

Answer

Ventricular tachycardia with a heart rate >100 bpm

Answer

Rapid ventricular rhythm with chaotic electrical activity

Answer

Ventricular tachycardia resolving spontaneously with a heart rate >100 bpm

Question 7

Which of the following murmurs increase with a Valsalva maneuver?

Accepted Answer

Hypertrophic cardiomyopathy

Answer

MR

Answer

VSD

Answer

AS

Question 8

Classification of aortic dissection depends on.

Accepted Answer

Level of aorta affected

Answer

Cause of dissection

Answer

Extent of symptoms

Answer

Percentage of aorta affected

Question 9

A 54-year-old man presents after a syncopal episode with no recollection of the event, and bystanders report that he regained consciousness approximately 45 seconds after falling. He has a history of bipolar disorder managed with quetiapine, and recently experienced prostatitis treated with ciprofloxacin. His other medications include lisinopril and hydrochlorothiazide for hypertension, and cyclobenzaprine and a hydrocodone/acetaminophen combination pill for low back pain. On examination, the patient is alert and oriented, with a nonfocal neurological examination and an unremarkable cardiac examination. Electrocardiogram shows nonspecific ST and T wave changes and a prolonged QT interval (QTc of 540 milliseconds). What is the best initial management approach?

Accepted Answer

Admit the patient for telemetry and evaluate for reversible causes of QT prolongation

Answer

Admit for permanent implantable cardioverter-defibrillator (ICD)

Answer

Admit and begin amiodarone infusion

Answer

Refer for genetic counseling

Question 10

In which of the following situations is intensive management of diabetes typically avoided?

Accepted Answer

Diabetes with acute myocardial infarction

Answer

Stable diabetes with no complications

Answer

Diabetes in a well-controlled state

Answer

Diabetes with stable renal function post-transplant

Cardiology — MCQs

Cardiology — MCQs

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