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Subject: Cardiovascular

1. What is the cause of depolarization in the SA node?

Jun 5, 2026

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2. When does the fourth heart sound (S4) occur?

Jun 5, 2026

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3. Which of the following is the primary determinant of stroke volume?

Jun 5, 2026

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6. Which ECG finding is characteristic of hypokalemia?

Jun 5, 2026

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7. A 58-year-old male with end-stage renal disease missed his scheduled dialysis session. He now presents to the Emergency Department with dyspnea, pulmonary edema, and ECG changes. Blood tests confirm severe hyperkalemia. Which of the following ECG findings is most characteristic of this condition?

Jun 5, 2026

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10. According to the Frank-Starling law of the heart, what happens when myocardial fibers are stretched due to increased preload?

Jun 5, 2026

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1. In hemorrhagic shock, which part of the nephron is the first to respond in compensatory mechanisms to maintain blood volume and pressure?

Jun 5, 2026

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7. The ST segment on an ECG corresponds to which phase of the cardiac cycle?

Jun 5, 2026

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9. Loud first heart sound (S1) is typically heard in which condition?

Jun 5, 2026

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2. What event is associated with the dicrotic notch on the arterial pressure waveform?

Jun 5, 2026

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