General Medicine

General Medicine Indian Medical PG Question 1: Drug used for euvolemic hyponatremia in patient with advanced congestive heart failure is?

• A. Nesiritide
• B. Tolvaptan (Correct Answer)
• C. Metoprolol
• D. Hydrocortisone

General Medicine Explanation: ***Tolvaptan*** - **Tolvaptan** is a selective **vasopressin V2-receptor antagonist** that promotes free water excretion (aquaresis) without significantly altering electrolyte balance, making it suitable for euvolemic hyponatremia [1]. - It works by blocking the action of **antidiuretic hormone (ADH)**, which is often elevated in patients with **congestive heart failure (CHF)** leading to water retention and hyponatremia [2]. *Nesiritide* - **Nesiritide** is a **recombinant human B-type natriuretic peptide (BNP)** that causes vasodilation and diuresis, but it is primarily used for acutely decompensated heart failure with signs of congestion, not specifically for euvolemic hyponatremia [1]. - While it can induce diuresis, its main role is to reduce **preload** and **afterload**, and it does not directly target the mechanism of euvolemic hyponatremia as effectively as an aquaretic agent [1]. *Metoprolol* - **Metoprolol** is a **beta-blocker** used to reduce heart rate and blood pressure, improving cardiac function in CHF patients. - It does not directly address **hyponatremia** and its mechanism of action is unrelated to water balance or sodium concentration. *Hydrocortisone* - **Hydrocortisone** is a **corticosteroid** used for conditions like adrenal insufficiency, inflammation, or allergic reactions. - It has no direct role in the management of **hyponatremia** or **congestive heart failure**.

General Medicine Indian Medical PG Question 2: What is the primary cardiovascular compensatory mechanism in acute hemorrhage?

• A. Decreased myocardial contractility
• B. Increased respiratory rate
• C. Decreased heart rate
• D. Increased heart rate (Correct Answer)

General Medicine Explanation: ***Increased heart rate*** - In acute hemorrhage, the body senses a decrease in **blood volume** and **blood pressure**, triggering the **baroreceptor reflex**. - This reflex leads to increased sympathetic nervous system activity, causing an immediate compensatory **increase in heart rate** to maintain **cardiac output** and tissue perfusion. *Decreased myocardial contractility* - A decrease in myocardial contractility would worsen the situation in hemorrhage by further reducing **cardiac output** and is not a primary compensatory mechanism. - While prolonged severe hemorrhage can lead to myocardial depression due to ischemia, it is a pathological consequence, not a compensatory response. *Decreased heart rate* - A decrease in heart rate would reduce **cardiac output** and further compromise blood flow to vital organs during hemorrhage, which is precisely the opposite of what the body needs. - This response is usually seen with vagal stimulation, not in response to hypovolemic shock. *Increased respiratory rate* - An **increased respiratory rate** is a compensatory mechanism for conditions like **metabolic acidosis** (which can occur in severe shock due to lactic acid accumulation) or to improve oxygenation, but it is not the primary cardiovascular compensatory mechanism for maintaining blood pressure and cardiac output in acute hemorrhage. - While it often accompanies hemorrhage, it acts to regulate oxygen and CO2 levels, not directly blood volume or pressure.

General Medicine Indian Medical PG Question 3: What is the immediate treatment modality for a patient presenting with acute anterior wall myocardial infarction and hypotension?

• A. Anticoagulation
• B. Thrombolytic therapy
• C. Intra-aortic balloon counterpulsation
• D. Primary Percutaneous Coronary Intervention (Primary PCI) (Correct Answer)

General Medicine Explanation: ***Primary Percutaneous Coronary Intervention (Primary PCI)*** - **Primary PCI**, guided by coronary angiography, is the **gold standard** for treating ST-elevation myocardial infarction (STEMI) because it directly restores blood flow to the *ischemic* myocardium. - In a patient with **acute anterior wall MI and hypotension**, immediate revascularization via Primary PCI is crucial to improve cardiac output and stabilize hemodynamics, as hypotension often implies significant myocardial damage and *cardiogenic shock*. - Guidelines recommend Primary PCI within **90 minutes** of first medical contact (door-to-balloon time) when available. *Thrombolytic therapy* - While thrombolysis can restore blood flow, it is considered a **second-line treatment** if PCI is unavailable or significantly delayed (>120 minutes from first medical contact). - It carries a higher risk of bleeding complications and may not achieve complete reperfusion, especially in patients with **hypotension** or *cardiogenic shock*. *Anticoagulation* - Anticoagulation is an **adjunctive therapy** used to prevent further clot formation and maintain coronary artery patency after reperfusion. - It is **not a definitive revascularization strategy** on its own and does not immediately address the acute coronary occlusion causing the MI and hypotension. *Intra-aortic balloon counterpulsation (IABP)* - **IABP** is a mechanical circulatory support device used to reduce *afterload* and increase *coronary perfusion*, primarily in patients with **cardiogenic shock** awaiting or recovering from revascularization. - While beneficial for hemodynamic support, it is **not the primary reperfusion treatment** and should be used in conjunction with immediate PCI, not as a substitute.

General Medicine Indian Medical PG Question 4: Which among the following is a sure sign of heart failure in an infant with congenital heart disease?

• A. Pedal oedema
• B. JVP
• C. Liver enlargement (Correct Answer)
• D. Basal crepitations

General Medicine Explanation: ***Liver enlargement*** - **Hepatomegaly** is a reliable sign of **heart failure in infants** because the infant's liver is very compliant and readily distends with increased systemic venous pressure. - Due to a less developed compensatory mechanism, infants often manifest heart failure with signs related to **systemic congestion**, with liver enlargement being a primary indicator. *Pedal oedema* - **Pedal edema is uncommon in infants** with heart failure compared to adults, as they are often supine and have less hydrostatic pressure effect on their lower extremities. - When present, it might be due to other causes or a sign of very severe, chronic heart failure rather than an early or "sure" sign. *JVP* - **Jugular venous distension (JVD) is difficult to assess accurately in infants** due to their short, fat necks and the difficulty in positioning and visualizing the neck veins. - Therefore, it is generally considered an **unreliable physical sign** for diagnosing heart failure in this age group. *Basal crepitations* - **Basal crepitations (rales)** indicate pulmonary congestion and can be a sign of left-sided heart failure. - However, in infants, these can also be caused by **bronchiolitis**, **pneumonia**, or other respiratory infections, making them a less specific "sure sign" than liver enlargement.

General Medicine Indian Medical PG Question 5: A 65-year-old female with a history of heart failure presents with new-onset ascites and peripheral edema. What is the most likely underlying cause of her ascites?

• A. Impaired left ventricular function
• B. Increased right atrial pressure (Correct Answer)
• C. Reduced oncotic pressure due to liver disease
• D. Thrombosis of the portal vein

General Medicine Explanation: ***Increased right atrial pressure*** - In heart failure, especially **right-sided heart failure**, elevated right atrial pressure leads to increased pressure in the **systemic venous circulation** [1]. - This increased hydrostatic pressure in the **hepatic sinusoids** and peripheral capillaries drives fluid extravasation into the peritoneal cavity (ascites) and interstitial spaces (edema). *Impaired left ventricular function* - While impaired left ventricular function is central to heart failure, it primarily causes **pulmonary congestion** and symptoms like dyspnea [1]. - It does not directly explain **ascites and peripheral edema** as the primary mechanism, which are more characteristic of right-sided failure or elevated systemic venous pressure [1]. *Reduced oncotic pressure due to liver disease* - Reduced oncotic pressure, typically caused by decreased **albumin synthesis** in significant **liver disease**, can lead to ascites and edema. - However, the patient's history of **heart failure** points to a cardiac origin for the fluid retention, not primary liver pathology. *Thrombosis of the portal vein* - **Portal vein thrombosis** causes **portal hypertension**, leading to ascites. - However, it typically does not cause generalized **peripheral edema** as seen here, and the patient's history of heart failure provides a more direct explanation for both ascites and edema.

General Medicine Flashcard 1 of 5

Question: In case of recurrent furunculosis, _____ should be excluded.

Answer: diabetes

General Medicine Flashcard 2 of 5

Question: Pellagra (from severe B3 deficiency) may be caused by _____ disease, malignant carcinoid syndrome, and isoniazid therapy

Answer: Hartnup

General Medicine Flashcard 3 of 5

Question: The causes of _____ anion gap metabolic acidosis may be remembered with the mnemonic MUDPILES: M: methanol (formic acid)U: uremiaD: diabetic ketoacidosisP: propylene glycolI: iron tablets or isoniazidL: lactic acidosisE: ethylene glycol (-> oxalic acid)S: salicylates (late)

Answer: high

General Medicine Flashcard 4 of 5

Question: A patient with treatment-resistant hypocalcemia after massive blood transfusion, also most likely has a co-existing _____.

Answer: hypomagnesemia

General Medicine Flashcard 5 of 5

Question: Urge incontinence/overactive bladder due to detrusor muscle instability is best treated with _____.

Answer: bladder training