Scenario: A 73-year-old man was transferred from the cardiac intensive care unit to the cardiac progressive care unit 2 days after coronary artery bypass graft (CABG) surgery. His medical history included hypertension, prediabetes, and a cerebrovascular accident, which resulted in minimal residual pain in his left arm. On arrival at the cardiac progressive care unit, his vital signs were stable: body temperature, 98.2 °F (36.8 °C); blood pressure, 107/63 mm Hg; pulse rate, 69 beats per minute in normal sinus rhythm; oxygen saturation as measured by pulse oximetry (Spo2), 98% on room air; and respiratory rate, 18 breaths per minute. Four hours after he arrived at the cardiac progressive care unit, the telemetry alarm sounded and the 2-lead (II and V1) electrocardiographic (ECG) rhythm strip shown here printed automatically.

Paroxysmal atrial fibrillation (AF) (beats 1 and 2) versus supraventricular tachycardia (beats 3–8) with a 2-second...

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