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Question 1 of 10⏱ 07:59
A 58-year-old man with a history of atrial fibrillation and prior stroke undergoes overnight PSG after his wife reports witnessed pauses in breathing. The study shows recurrent respiratory events, each preceded by a crescendo-decrescendo pattern of tidal volume without associated snoring, chest and abdominal effort largely absent during the events, and no evidence of airway obstruction on the flow signal. Which specific finding pattern most strongly distinguishes this presentation from obstructive sleep apnea?
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