Alternating Wenckebach cycles with right bundle branch block

A 29-year-old female with a history of peripartum dilated cardiomyopathy with left ventricular ejection fraction 25%, hypertension, obstructive sleep apnea, and pulmonary hypertension was admitted to the hospital in acute decompensated heart failure and acute on chronic renal failure. She was initiated on dobutamine at 2.5  μg/kg/min intravenously and developed a regular narrow complex tachycardia at 210 beats per minute. This was determined to be an atrial tachycardia with 1:1 atrioventricular conduction.
Source: Journal of Electrocardiology - Category: Cardiology Authors: Source Type: research