Cardiology Practice Questions

Q: In Type 1 Diabetes Mellitus (DM) stage 3 beta cell destruction, which of the following is the most likely presentation?

Hyperglycemia symptomatic. ***Hyperglycemia symptomatic*** - **Type 1 DM stage 3** is characterized by sufficient **beta-cell destruction** to cause overt hyperglycemia. - This level of hyperglycemia typically leads to classic symptoms such as **polyuria, polydipsia, and weight loss**. *Dysglycemic symptomatic* - **Dysglycemic** refers to abnormal blood sugar levels, but this term is too broad and doesn't specify the degree or symptomatic nature as precisely as **hyperglycemia symptomatic**. - While patients are symptomatic, the primary issue is **hyperglycemia**, making that a more specific and accurate description. *Normoglycemic symptomatic* - **Normoglycemic** implies normal blood sugar levels, which is inconsistent with **Type 1 DM stage 3** where significant beta-cell destruction has occurred. - This stage is defined by definite hyperglycemia, so a patient cannot be symptomatic while having normal glucose levels due to the disease. *Dysglycemic asymptomatic* - While there is **dysglycemia**, **asymptomatic presentation** is more characteristic of earlier stages (Type 1 DM stage 2), where hyperglycemia is present but not yet severe enough to cause overt symptoms. - In **stage 3**, beta-cell destruction is substantial, leading to glucose levels that are high enough to cause noticeable symptoms. *Normoglycemic asymptomatic* - **Normoglycemic asymptomatic** describes **Type 1 DM stage 1**, where autoimmunity is present but beta-cell destruction has not yet progressed enough to affect glucose levels. - This is the earliest stage of Type 1 DM, well before the overt hyperglycemia seen in stage 3.

Q: A young patient in an endemic area presents with pleural fluid showing LDH level greater than 0.6 times the serum LDH, protein level greater than 0.5 times the serum protein, and lymphocytic predominance. What is the most likely diagnosis?

Tuberculosis. ***Tuberculosis*** - The patient's presentation with **exudative pleural fluid** (LDH > 0.6 times serum LDH, protein > 0.5 times serum protein) in an **endemic area** strongly suggests tuberculosis. - The **lymphocytic predominance** in the pleural fluid is a hallmark characteristic of tuberculous pleurisy. - **Young age** and **endemic area** further support TB as the most likely diagnosis. *Heart failure* - Pleural effusions due to heart failure are typically **transudative**, meaning they have low protein and LDH levels. - While heart failure can lead to pleural effusions, the fluid characteristics (exudative, lymphocytic predominance) do not fit this diagnosis. *Hepatic failure* - Pleural effusions in hepatic failure (e.g., due to cirrhosis) are usually **transudative** and result from fluid shifting from the abdomen (hepatic hydrothorax). - The fluid analysis in this scenario (exudative, lymphocytic predominance) is inconsistent with hepatic failure. *Renal failure* - Pleural effusions associated with renal failure (e.g., uremic pleurisy) can be exudative, but they often present with a **neutrophilic predominance** or may be hemorrhagic. - The specific lymphocytic predominance points away from typical renal failure-associated effusions. *Malignancy* - While malignant pleural effusions (lymphoma, metastatic carcinoma) can present with **lymphocytic predominance** and exudative characteristics, the clinical context is crucial. - The patient's **young age** and presentation in an **endemic area for tuberculosis** makes TB far more likely than malignancy. - In endemic areas, TB should be ruled out first before considering malignancy in young patients with lymphocytic pleural effusions.

Q: A patient presents with hypotension, hyponatremia, and blackening of the palmar creases. Which of the following conditions is most likely associated with these symptoms?

Addison disease. ***Addison disease*** - **Hypotension**, **hyponatremia**, and **hyperpigmentation** (blackening of palmar creases) are classic symptoms of **primary adrenal insufficiency** or Addison disease, due to deficient cortisol and aldosterone. - The lack of **cortisol** leads to hypotension and fatigue, while the absence of **aldosterone** causes hyponatremia and hyperkalemia. *Conn syndrome* - This condition involves **primary hyperaldosteronism**, typically leading to **hypertension** and **hypokalemia**, which contradicts the patient's symptoms of hypotension and hyponatremia. - Pigmentation changes are not a feature of Conn syndrome. *Cushing's syndrome* - Characterized by **excess cortisol**, leading to symptoms like **hypertension**, **hyperglycemia**, and central obesity, not hypotension or hyperpigmentation. - **Hyponatremia** is also not typical in Cushing's syndrome. *Primary ACTH deficiency* - Also known as **secondary adrenal insufficiency**, this condition results in low cortisol but typically spares aldosterone production, meaning **hyponatremia** and **hyperkalemia** are less common. - **Hyperpigmentation** does not occur in primary ACTH deficiency because ACTH levels are low. *Sheehan syndrome* - This is **postpartum pituitary necrosis** causing panhypopituitarism, which can lead to secondary adrenal insufficiency with hypotension and hyponatremia. - However, **hyperpigmentation does not occur** in Sheehan syndrome because ACTH levels are low (secondary insufficiency), not elevated as in Addison disease. - The clinical context would typically include a history of postpartum hemorrhage and failure to lactate.

Q: A patient presents with wheezing that improves with as-needed use of albuterol. Spirometry shows FEV1 ranging from 70 % to 83 %, and the patient experiences nighttime chest tightening twice a week. What is the most appropriate treatment?

Add an inhaled corticosteroid. ***Add an inhaled corticosteroid*** * The patient has persistent asthma as evidenced by symptoms occurring twice a week (nighttime chest tightening), and **FEV1 variability** despite current albuterol use. * Adding a **low-dose inhaled corticosteroid** is the recommended *first-line controller treatment* for persistent asthma to reduce inflammation and prevent exacerbations per **GINA guidelines**. *Continue with albuterol* * Continuing albuterol alone is insufficient for persistent asthma, as it only provides **symptomatic relief** and does not address the underlying inflammation. * This approach would lead to continued symptoms and potential **asthma exacerbations**. *Replace with salmeterol twice daily* * Salmeterol is a **long-acting beta-agonist (LABA)**, and while it provides prolonged bronchodilation, it should never be used as monotherapy in asthma due to the risk of severe exacerbations. * LABAs should always be prescribed in combination with an **inhaled corticosteroid**. *Start Tab prednisolone* * **Oral prednisolone** is a systemic corticosteroid typically reserved for **severe asthma exacerbations** or for patients whose symptoms are not controlled by high-dose inhaled corticosteroids and other controller medications. * It carries more significant **side effects** with long-term use compared to inhaled corticosteroids. *Add a leukotriene modifier* * While **leukotriene receptor antagonists** (e.g., montelukast) can be used as alternative controller therapy for mild persistent asthma, they are considered **less effective** than inhaled corticosteroids. * They are typically reserved as an alternative for patients who cannot use or tolerate inhaled corticosteroids, or as **add-on therapy** in more severe cases.

Q: 30-year-old male, weighing 70 kg , presents with a serum sodium level of $120 \mathrm{mEq} / \mathrm{L}$. Calculate the total sodium deficit.

840 mEq. ***840 mEq*** - The formula for calculating **total sodium deficit** is: **(Desired Na - Actual Na) × Total Body Water (TBW)**. - In a male, TBW is approximately **60% of body weight**. For a 70 kg male, **TBW = 0.6 × 70 kg = 42 L**. - With a desired sodium of **140 mEq/L** (normal) and actual sodium of **120 mEq/L**, the total deficit is: - **(140 - 120) × 42 = 20 × 42 = 840 mEq** - This represents the **complete calculated sodium deficit** needed to restore serum sodium to normal levels. - **Note:** In clinical practice, this entire deficit is NOT replaced rapidly. Typically, only **6-12 mEq/L increase per 24 hours** is recommended to prevent **osmotic demyelination syndrome**, but the question asks for the total calculated deficit. *630 mEq* - This value represents a **partial correction target**, corresponding to raising serum sodium to approximately **135 mEq/L** instead of 140 mEq/L: (135 - 120) × 42 = 630 mEq. - Alternatively, it equals about **75% of the total deficit** (840 × 0.75 = 630). - While this may reflect a practical clinical target, it does not answer the question which asks for the **total deficit**. *420 mEq* - This corresponds to raising serum sodium by **10 mEq/L** (10 × 42 = 420 mEq). - This represents the **maximum recommended increase in the first 24 hours** to prevent complications. - It is a safe initial correction amount but not the total calculated deficit. *280 mEq* - This represents an even smaller increment, roughly equivalent to raising serum sodium by **6-7 mEq/L**. - This would be an **ultra-conservative initial correction** for chronic hyponatremia. - It significantly underestimates the total sodium deficit. *1260 mEq* - This is an **overestimation** that might result from incorrectly using 100% body weight as TBW instead of 60%: (140 - 120) × 70 = 1400 mEq (close to this range). - Or from miscalculation using wrong formula components. - This exceeds the actual total sodium deficit.

Q: A patient presents with confusion, altered mental status, and unusual behavior. On examination, CNS features such as disorientation and lethargy are noted. Laboratory results reveal a urine osmolality of 1000 mOsm/kg and a plasma osmolality of 250 mOsm/kg. What is the most likely electrolyte imbalance?

Hyponatremia. ***Hyponatremia*** - The **low plasma osmolality** (250 mOsm/kg) combined with a **high urine osmolality** (1000 mOsm/kg) indicates that the kidneys are inappropriately concentrating urine despite diluted plasma, a hallmark finding in euvolemic hyponatremia. - **Confusion**, **altered mental status**, and **unusual behavior** are classic neurological symptoms associated with hyponatremia, particularly when it develops acutely or severely. *Hypokalemia* - **Hypokalemia** is characterized by low serum potassium and can cause muscle weakness, arrhythmias, and fatigue, but it does not directly explain the given plasma and urine osmolality findings. - The neurological symptoms described are not typical primary manifestations of hypokalemia. *Hyperkalemia* - **Hyperkalemia** involves high serum potassium, commonly leading to cardiac arrhythmias and muscle weakness. - The provided **osmolality values** are not consistent with a primary diagnosis of hyperkalemia. *Hypernatremia* - **Hypernatremia** is defined by high serum sodium and would present with **high plasma osmolality**, which contradicts the given plasma osmolality of 250 mOsm/kg. - While it can cause neurological symptoms, the osmolality findings rule it out. *Hypercalcemia* - **Hypercalcemia** can present with neurological symptoms including confusion and lethargy ("stones, bones, groans, and psychiatric overtones"). - However, hypercalcemia does not produce the characteristic **low plasma osmolality with high urine osmolality** pattern seen in this case.

Q: A patient presents with breathing difficulty and generalized weakness. On auscultation, a middiastolic murmur with a prominent "a" wave is observed. What is the most likely diagnosis?

Tricuspid Stenosis (TS). ***Tricuspid Stenosis (TS)*** - A **middiastolic murmur** in the tricuspid area (usually left lower sternal border) along with a **prominent "a" wave** (due to increased right atrial pressure against a stenotic tricuspid valve) is pathognomonic for tricuspid stenosis. - The symptoms of **breathing difficulty** and **generalized weakness** can arise from reduced cardiac output and venous congestion characteristic of TS. *Mitral Regurgitation (MR)* - MR typically presents with a **holosystolic murmur** best heard at the apex and radiating to the axilla. - It does not characteristically produce a middiastolic murmur or a prominent "a" wave. *Mitral Stenosis (MS)* - MS causes a **diastolic rumble** with an **opening snap**, best heard at the apex, but it is not typically associated with a pronounced "a" wave in the jugular venous pulse unless there's associated pulmonary hypertension and right heart strain. - The murmur is usually localized to the apex, whereas tricuspid murmurs are typically heard from the lower left sternal border. *Tricuspid Regurgitation (TR)* - TR is characterized by a **holosystolic murmur** that increases with inspiration, heard at the left lower sternal border. - It typically causes a prominent **"v" wave** in the jugular venous pulse due to regurgitant flow into the right atrium, not a prominent "a" wave. *Pulmonary Stenosis (PS)* - PS presents with a **systolic ejection murmur** at the left upper sternal border (pulmonic area), not a diastolic murmur. - While it can cause right heart strain, it does not produce the characteristic middiastolic murmur or prominent "a" wave seen in tricuspid stenosis.

Q: A patient presents with breathlessness and wheezing. Absolute eosinophil count is 500 cells/ $\mu \mathrm{L}$. Chest X-ray shows a miliary pattern. What is the most likely diagnosis?

Tropical pulmonary eosinophilia. ***Tropical pulmonary eosinophilia*** - This condition is characterized by **eosinophilia** (absolute eosinophil count >500 cells/µL), **respiratory symptoms** such as breathlessness and wheezing, and a **miliary pattern** on chest X-ray, all consistent with the patient's presentation. - It results from a **hypersensitivity reaction** to microfilariae from Wuchereria bancrofti or Brugia malayi in individuals living in endemic regions. *Bronchial asthma* - While bronchial asthma can cause **breathlessness** and **wheezing**, a miliary pattern on chest X-ray is **not typical**, nor is an eosinophil count of 500 cells/µL, though eosinophilia can occur. - Asthma is primarily a disease of reversible airway obstruction, often triggered by **allergens** or irritants. *Miliary Tuberculosis (TB)* - **Miliary TB** would present with a miliary pattern on chest X-ray and breathlessness, but it is typically associated with **low or normal eosinophil counts**, and wheezing is less common. - Fever, night sweats, and weight loss are also common symptoms of Miliary TB. *Hypersensitivity pneumonitis* - This condition involves inflammation of the lung alveoli due to inhalation of organic dusts or chemicals, causing **breathlessness** and, occasionally, wheezing, but **eosinophilia is not a primary feature**. - Chest X-ray findings can be diverse, but a **miliary pattern** is less specific than for tropical pulmonary eosinophilia. *Allergic bronchopulmonary aspergillosis (ABPA)* - ABPA can present with **eosinophilia**, **wheezing**, and respiratory symptoms, but chest X-ray typically shows **central bronchiectasis** and **fleeting infiltrates** rather than a miliary pattern. - It occurs in patients with asthma or cystic fibrosis and is characterized by **hypersensitivity to Aspergillus fumigatus**.

Question 1

In Type 1 Diabetes Mellitus (DM) stage 3 beta cell destruction, which of the following is the most likely presentation?

Accepted Answer

Hyperglycemia symptomatic

Answer

Dysglycemic symptomatic

Answer

Normoglycemic symptomatic

Answer

Dysglycemic asymptomatic

Answer

Normoglycemic asymptomatic

Question 2

A young patient in an endemic area presents with pleural fluid showing LDH level greater than 0.6 times the serum LDH, protein level greater than 0.5 times the serum protein, and lymphocytic predominance. What is the most likely diagnosis?

Accepted Answer

Tuberculosis

Answer

Heart failure

Answer

Hepatic failure

Answer

Renal failure

Answer

Malignancy

Question 3

A patient presents with hypotension, hyponatremia, and blackening of the palmar creases. Which of the following conditions is most likely associated with these symptoms?

Accepted Answer

Addison disease

Answer

Conn syndrome

Answer

Cushing's syndrome

Answer

Primary ACTH deficiency

Answer

Sheehan syndrome

Question 4

A patient presents with wheezing that improves with as-needed use of albuterol. Spirometry shows FEV1 ranging from 70 % to 83 %, and the patient experiences nighttime chest tightening twice a week. What is the most appropriate treatment?

Accepted Answer

Add an inhaled corticosteroid

Answer

Continue with albuterol

Answer

Replace with salmeterol twice daily

Answer

Start Tab prednisolone

Answer

Add a leukotriene modifier

Question 5

A 60-year-old lady presents with shortness of breath (SOB) and episodes of angina pectoris. Work-up reveals aortic stenosis. Which of the following is the most likely reason behind these chest pain episodes?

Accepted Answer

Increased oxygen consumption in the heart

Answer

Increased pressure in aorta

Answer

Decreased pressure in aorta

Answer

Increase in volume overload of the heart

Answer

Decreased coronary blood flow

Question 6

A hypertensive patient presents with an irregularly irregular pulse and a loud P2 on auscultation. Which JVP finding is likely to be seen in this patient?

Accepted Answer

Absent a wave

Answer

Cannon a wave

Answer

Rapid $x$ descent

Answer

Rapid $y$ descent

Answer

Prominent v wave

Question 7

30-year-old male, weighing 70 kg , presents with a serum sodium level of $120 \mathrm{mEq} / \mathrm{L}$. Calculate the total sodium deficit.

Accepted Answer

840 mEq

Answer

630 mEq

Answer

280 mEq

Answer

420 mEq

Answer

1260 mEq

Question 8

A patient presents with confusion, altered mental status, and unusual behavior. On examination, CNS features such as disorientation and lethargy are noted. Laboratory results reveal a urine osmolality of 1000 mOsm/kg and a plasma osmolality of 250 mOsm/kg. What is the most likely electrolyte imbalance?

Accepted Answer

Hyponatremia

Answer

Hypokalemia

Answer

Hyperkalemia

Answer

Hypernatremia

Answer

Hypercalcemia

Question 9

A patient presents with breathing difficulty and generalized weakness. On auscultation, a middiastolic murmur with a prominent "a" wave is observed. What is the most likely diagnosis?

Accepted Answer

Tricuspid Stenosis (TS)

Answer

Mitral Regurgitation (MR)

Answer

Mitral Stenosis (MS)

Answer

Tricuspid Regurgitation (TR)

Answer

Pulmonary Stenosis (PS)

Question 10

A patient presents with breathlessness and wheezing. Absolute eosinophil count is 500 cells/ $\mu \mathrm{L}$. Chest X-ray shows a miliary pattern. What is the most likely diagnosis?

Accepted Answer

Tropical pulmonary eosinophilia

Answer

Bronchial asthma

Answer

Miliary Tuberculosis (TB)

Answer

Hypersensitivity pneumonitis

Answer

Allergic bronchopulmonary aspergillosis (ABPA)

Cardiology — MCQs

Cardiology — MCQs

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