ECG of the Month: Patient Presents with a One-Week Increase in Dyspnea and Orthopnea
A 72-year-old man with history of coronary artery disease, hypertension, cerebrovascular accident, hyperlipidemia, and ischemic cardiomyopathy. His left ventricular ejection fraction is 35%. He is seen because of a one-week increase in dyspnea and orthopnea. An electrocardiogram (ECG) is performed (Figure 1).
The ECG shows which of the following?