Cardiology Practice Questions

Q: Which of the following conditions is LEAST likely to cause peripheral edema?

Venous insufficiency. Venous insufficiency - **Venous insufficiency** is a common cause of peripheral edema due to impaired venous return leading to fluid accumulation in the lower extremities. - It is characterized by **pitting edema**, skin changes, and often associated with varicose veins. *Nephrotic syndrome* - **Nephrotic syndrome** causes generalized edema, including peripheral edema, due to significant **proteinuria** [1] leading to hypoalbuminemia and decreased plasma oncotic pressure. - The reduced oncotic pressure causes fluid to shift from the intravascular space into the interstitial space. *Congestive heart failure* - **Congestive heart failure** leads to peripheral edema primarily due to increased hydrostatic pressure in the capillaries as a result of the heart's inability to pump blood effectively. - This results in fluid extravasation into the interstitial tissues, often presenting as **pitting edema** in the ankles and legs. *Hyperthyroidism* - While **hyperthyroidism** is not a classic cause of significant peripheral edema, some patients can develop **pretibial myxedema**, which is a condition associated with autoimmune thyroid disease. - This form of edema is typically non-pitting and localized, and it is not a direct result of increased hydrostatic or decreased oncotic pressure in the same way as conditions like CHF or nephrotic syndrome.

Q: What mechanism primarily leads to cough in patients with congestive heart failure?

Fluid accumulation in alveoli. ***Fluid accumulation in alveoli*** - In **congestive heart failure (CHF)**, the heart's pumping efficiency decreases, leading to **pulmonary venous congestion** and increased hydrostatic pressure [1]. - This pressure forces fluid from the capillaries into the **interstitial space** and subsequently into the alveoli, triggering a cough reflex to clear the airways [1]. *Stimulation of pulmonary J-receptors* - While J-receptors can be stimulated by **interstitial edema** and distension, this stimulation primarily contributes to **dyspnea** (shortness of breath) and shallow, rapid breathing rather than directly initiating a productive cough [1]. - The cough in CHF is more directly related to the physical presence of fluid within the alveolar spaces [1]. *Upper airway obstruction due to edema* - **Upper airway obstruction** from edema is less common as a primary cause of cough in CHF and is more characteristic of conditions like **angioedema** or **laryngitis** [2]. - The edema in CHF predominantly affects the lower respiratory tract, specifically the **pulmonary parenchyma**. *Increased airway resistance* - **Increased airway resistance** is typically associated with conditions like **asthma** or **chronic obstructive pulmonary disease (COPD)** where there is **bronchoconstriction** or inflammation of the bronchioles [3]. - Although some degree of bronchoconstriction can occur due to congestion, the primary mechanism for cough in CHF is not airway resistance but alveolar fluid filling.

Q: A 45-year-old male presents with progressive dyspnea, orthopnea, and paroxysmal nocturnal dyspnea. His echocardiogram shows reduced ejection fraction and pulmonary congestion. What is the most appropriate management?

IV diuretics and nitrates. The patient's symptoms (dyspnea, orthopnea, PND) and echocardiogram findings (reduced ejection fraction, **pulmonary congestion**) are classic for **acute decompensated heart failure** [1]. - **IV diuretics** (e.g., furosemide) help reduce **preload** and alleviate pulmonary congestion, while **nitrates** (e.g., nitroglycerin) reduce both **preload and afterload**, improving cardiac output and symptoms [1]. *Inhaled corticosteroids* - These are primarily used for managing **inflammatory airway diseases** like **asthma** or COPD. - They would not address the underlying **cardiac pathology** or acute pulmonary congestion in heart failure. *IV antibiotics* - Antibiotics are indicated for **bacterial infections**, which are not suggested by the clinical presentation of progressive dyspnea and isolated cardiac dysfunction. - Giving antibiotics without evidence of infection would be inappropriate and could contribute to **antibiotic resistance**. *Thoracentesis* - Thoracentesis is a procedure to remove fluid from the **pleural space**. While pulmonary congestion and heart failure can lead to **pleural effusions**, it's usually not the first-line management for acute heart failure symptoms. - The primary treatment focuses on reducing **intravascular volume** and improving cardiac function, which would often resolve effusions without the need for an invasive procedure.

Q: A 50-year-old male presents with sharp, localized chest pain, worse with deep breaths and relieved by sitting up. ECG is normal. What is the most likely diagnosis?

Pericarditis. ***Pericarditis*** - The classic presentation of **sharp, localized chest pain** that is **worse with deep breaths** and **relieved by sitting up and leaning forward** is highly characteristic of pericarditis [2]. - A **normal ECG** makes other cardiac causes less likely, supporting the diagnosis of pericarditis, which can have diffuse ST elevation or PR depression as ECG findings, but a normal ECG doesn't rule it out, especially early on [2]. *Pneumothorax* - While pneumothorax can cause **sharp chest pain** and be **respiratory variation**, it is typically associated with **dyspnea** and **diminished breath sounds** on examination, which are not mentioned here. - The pain relief with sitting up is not characteristic of pneumothorax. *Myocardial infarction* - **Myocardial infarction** pain is typically described as a **heavy, pressure-like sensation**, often radiating to the arm, jaw, or back, and is usually not relieved by position changes [1]. - A **normal ECG** makes acute myocardial infarction less likely, though it does not entirely rule out non-ST elevation myocardial infarction (NSTEMI). *Pleuritis* - **Pleuritis** also causes **sharp, pleuritic chest pain** that worsens with deep inspiration or coughing. - However, the classic relief with **sitting up and leaning forward** is more specific to pericarditis than pleuritis.

Q: Which of the following conditions is least likely to present with pleuritic chest pain?

Aortic dissection. ### Aortic dissection - While it causes severe chest pain, the pain from **aortic dissection** is typically described as **ripping or tearing** and does not usually worsen with breathing, making pleuritic pain unlikely [2]. - The pain is usually due to the dissection of the **aortic wall** itself, which is not innervated in a way that produces pleuritic pain. *Acute pericarditis* - **Acute pericarditis** frequently causes pleuritic chest pain that is often described as sharp, **stabbing**, and worse with inspiration or lying flat [1]. - This is because the inflamed pericardium can irritate the adjacent pleura, leading to pain that is exacerbated by respiratory movements. *Pneumothorax* - **Pneumothorax** (collapsed lung) classically presents with sudden onset **sharp**, pleuritic chest pain and shortness of breath [3]. - The pain is due to the stretching of the **pleura** as air accumulates in the pleural space, leading to irritation and inflammation [3]. *Pulmonary embolism* - **Pulmonary embolism (PE)** can cause pleuritic chest pain, particularly if it leads to **pulmonary infarction** affecting the pleural surface. - The pain is often sudden, sharp, and worsened by deep breathing or coughing, reflecting irritation of the parietal pleura.

Q: A 45-year-old man presents with intermittent pain in the chest, radiating to the left arm, aggravated by exertion, and relieved by rest. What is the most appropriate initial investigation?

ECG. ***ECG*** - An **ECG** is the most appropriate initial investigation for suspected **angina pectoris** due to its rapid availability and ability to detect signs of **myocardial ischemia** or infarction [1]. - It can reveal changes such as **ST-segment depression** or elevation, **T-wave inversion**, or pathological Q waves [1]. *Chest X-ray* - A **chest X-ray** is useful for evaluating conditions like **pneumonia**, **pneumothorax**, or **heart failure** (cardiomegaly, pulmonary edema). - It is generally not the first-line diagnostic tool for **ischemic heart disease** as it cannot directly visualize coronary arteries or myocardial ischemia. *Cardiac enzymes* - **Cardiac enzymes** (e.g., troponin, CK-MB) are crucial for diagnosing **acute myocardial infarction** but are typically elevated hours after the onset of chest pain. - While important for confirming an MI, they are not the *initial* investigation for transient, exertion-related chest pain suggestive of **stable angina** [1]. *Echocardiogram* - An **echocardiogram** provides detailed information about **cardiac structure** and function, including **wall motion abnormalities**, valve function, and overall ejection fraction [1]. - While valuable, it is usually performed after an ECG to further evaluate the heart's pumping ability and identify **regional wall motion abnormalities** indicative of ischemia, rather than as the very first step [1].

Q: A 55-year-old male presents with severe, crushing chest pain and shortness of breath. ECG shows ST elevation in the inferior leads. What is the most appropriate immediate management?

Percutaneous coronary intervention. ***Percutaneous coronary intervention*** - **Primary PCI** is the preferred **immediate reperfusion strategy** for **STEMI** when available within **90 minutes** (door-to-balloon time), as it directly restores coronary patency and salvages myocardium. - The patient's presentation with **severe crushing chest pain**, **shortness of breath**, and **ST elevation in inferior leads** confirms **STEMI**, requiring urgent coronary intervention to restore blood flow. *Thrombolysis* - **Fibrinolytic therapy** is an alternative reperfusion strategy only when **PCI is unavailable** or cannot be performed within recommended timeframes. - Since the question doesn't indicate PCI unavailability, **primary PCI remains superior** due to better outcomes and lower bleeding risk compared to thrombolysis. *Oxygen and nitroglycerin* - These are **supportive measures** that provide symptom relief but do not address the underlying **coronary artery occlusion** causing the STEMI. - **Oxygen** is only indicated for **hypoxia** (not routine), and **nitroglycerin** relieves chest pain but doesn't restore coronary patency, which is paramount in STEMI management. *Beta blockers* - **Beta blockers** are important **adjunctive therapy** typically administered **within 24 hours post-reperfusion** to reduce myocardial oxygen demand and improve long-term outcomes. - They are **not the immediate priority** when urgent **revascularization** is needed to restore blood flow to the ischemic myocardium in STEMI.

Q: A 55-year-old patient with cyanosis and a history of atrial fibrillation is at increased risk for which of the following complications?

Thromboembolism. ***Thromboembolism*** - **Atrial fibrillation** causes irregular and often rapid heart rates, leading to inefficient atrial emptying and **blood stasis** within the atria [1]. - This stasis promotes **clot formation**, and these clots can dislodge and travel to other parts of the body, causing **thromboembolic events** like stroke or peripheral arterial occlusion [1]. *Hypercalcemia* - **Hypercalcemia** is an elevated calcium level in the blood, typically associated with **parathyroid disorders** or malignancies. - It does not have a direct causal link to atrial fibrillation or cyanosis. *Hypovolemic shock* - **Hypovolemic shock** is a life-threatening condition resulting from **severe blood or fluid loss**, leading to inadequate organ perfusion. - While patients with heart conditions can experience various shocks, hypovolemic shock is not a direct consequence of atrial fibrillation or cyanosis. *Pulmonary edema* - **Pulmonary edema** is characterized by fluid accumulation in the lungs, often due to **heart failure** or acute respiratory distress syndrome. - While atrial fibrillation can contribute to heart failure, pulmonary edema is a *symptom* of severe heart dysfunction rather than a primary complication of atrial fibrillation in the context of increased embolic risk [2].

Q: A 40F with progressive exertional dyspnea and cyanosis. Physical examination reveals digital clubbing and a loud P2 heart sound. Most appropriate next step in diagnosis?

Echocardiography. ***Echocardiography*** - The presence of **exertional dyspnea**, **cyanosis**, **digital clubbing**, and a **loud P2 heart sound** strongly suggests pulmonary hypertension [1]. - An **echocardiogram** is crucial for directly visualizing the heart chambers and great vessels, allowing for the estimation of **pulmonary artery pressures** and assessing right ventricular function, which is key in diagnosing and evaluating **pulmonary hypertension** [1]. *Pulmonary function test* - While pulmonary function tests (PFTs) assess lung mechanics and volumes, they primarily help diagnose **obstructive** or **restrictive lung diseases**. - PFTs do not directly measure **pulmonary artery pressures** or assess cardiac structure, which are central to the patient's presentation. *Chest X-ray* - A chest X-ray can show signs of **pulmonary hypertension** such as **enlarged pulmonary arteries** or **cardiomegaly** [1], [2]. - However, it provides limited information regarding cardiac function and **pulmonary artery pressures** and is less specific than an echocardiogram for initial diagnosis [1]. *Electrocardiogram* - An ECG can detect signs of **right ventricular hypertrophy** or **right axis deviation**, which may be present in **pulmonary hypertension** [2]. - However, it offers no direct information on **pulmonary artery pressures** or structural abnormalities of the heart chambers.

Q: A 30-year-old woman presents with shortness of breath, cyanosis, and a loud S2 sound on auscultation. Which of the following is the most likely diagnosis?

Pulmonary hypertension. ***Pulmonary hypertension*** - **Shortness of breath** and **cyanosis** indicate severe **hypoxia** and **reduced cardiac output**, which are hallmarks of high **pulmonary artery pressure**. [1] - A **loud S2** results from increased pressure in the pulmonary artery causing a forceful closure of the **pulmonic valve**. *Aortic regurgitation* - Characterized by a **diastolic murmur** and **bounding peripheral pulses**; **cyanosis** and a loud S2 are not typical features. - Patients often present with **dyspnea on exertion**, but not usually with prominent **cyanosis** unless heart failure is very advanced. *Mitral stenosis* - Typically presents with **dyspnea**, **cough**, and a **loud S1**, along with a **diastolic rumble** at the apex. - While it can lead to **pulmonary hypertension**, a loud S2 alone in the absence of a characteristic murmur does not make it the primary diagnosis. *Pericarditis* - Presents with sharp, pleuritic **chest pain** that improves with leaning forward, and often includes a **pericardial friction rub**. - **Shortness of breath** may occur due to pain or tamponade, but **cyanosis** and a loud S2 are not characteristic features of uncomplicated pericarditis.

Question 1

Which of the following conditions is LEAST likely to cause peripheral edema?

Accepted Answer

Venous insufficiency

Answer

Nephrotic syndrome

Answer

Congestive heart failure

Answer

Hyperthyroidism

Question 2

What mechanism primarily leads to cough in patients with congestive heart failure?

Accepted Answer

Fluid accumulation in alveoli

Answer

Stimulation of pulmonary J-receptors

Answer

Upper airway obstruction due to edema

Answer

Increased airway resistance

Question 3

A 45-year-old male presents with progressive dyspnea, orthopnea, and paroxysmal nocturnal dyspnea. His echocardiogram shows reduced ejection fraction and pulmonary congestion. What is the most appropriate management?

Accepted Answer

IV diuretics and nitrates

Answer

Inhaled corticosteroids

Answer

IV antibiotics

Answer

Thoracentesis

Question 4

A 50-year-old male presents with sharp, localized chest pain, worse with deep breaths and relieved by sitting up. ECG is normal. What is the most likely diagnosis?

Accepted Answer

Pericarditis

Answer

Pneumothorax

Answer

Myocardial infarction

Answer

Pleuritis

Question 5

Which of the following conditions is least likely to present with pleuritic chest pain?

Accepted Answer

Aortic dissection

Answer

Acute pericarditis

Answer

Pneumothorax

Answer

Pulmonary embolism

Question 6

A 45-year-old man presents with intermittent pain in the chest, radiating to the left arm, aggravated by exertion, and relieved by rest. What is the most appropriate initial investigation?

Accepted Answer

ECG

Answer

Chest X-ray

Answer

Cardiac enzymes

Answer

Echocardiogram

Question 7

A 55-year-old male presents with severe, crushing chest pain and shortness of breath. ECG shows ST elevation in the inferior leads. What is the most appropriate immediate management?

Accepted Answer

Percutaneous coronary intervention

Answer

Beta blockers

Answer

Oxygen and nitroglycerin

Answer

Thrombolysis

Question 8

A 55-year-old patient with cyanosis and a history of atrial fibrillation is at increased risk for which of the following complications?

Accepted Answer

Thromboembolism

Answer

Hypercalcemia

Answer

Hypovolemic shock

Answer

Pulmonary edema

Question 9

A 40F with progressive exertional dyspnea and cyanosis. Physical examination reveals digital clubbing and a loud P2 heart sound. Most appropriate next step in diagnosis?

Accepted Answer

Echocardiography

Answer

Pulmonary function test

Answer

Chest X-ray

Answer

Electrocardiogram

Question 10

A 30-year-old woman presents with shortness of breath, cyanosis, and a loud S2 sound on auscultation. Which of the following is the most likely diagnosis?

Accepted Answer

Pulmonary hypertension

Answer

Aortic regurgitation

Answer

Mitral stenosis

Answer

Pericarditis

Cardiology — MCQs

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