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Review Question - QID 212481

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QID 212481 (Type "212481" in App Search)
A 63-year-old man undergoes workup for nocturnal dyspnea and what he describes as a "choking" sensation while sleeping. He also endorses fatigue and dyspnea on exertion. Physical exam reveals a normal S1, loud P2, and a neck circumference of 17 inches (43 cm) (normal < 14 inches (< 35 cm)). His temperature is 98.8°F (37°C), blood pressure is 128/82 mmHg, pulse is 86/min, and respirations are 19/min. He undergoes spirometry, which is unrevealing, and polysomnography, which shows 16 hypopneic and apneic events per hour. Mean pulmonary arterial pressure is 30 mmHg. Which of the following complications is this patient most at risk for?