Abstract
Scenario: Currently under the care of a cardiologist for cardiomyopathy with a low ejection fraction, a 58-year-old man comes to his outpatient cardiology clinic with complaints of recurrent chest discomfort and shortness of breath. Other complaints include a cold “shivering” feeling and nocturnal dyspnea. ECG PUZZLER A regular feature of the American Journal of Critical Care, the ECG Puzzler addresses ECG interpretation for clinical practice. We welcome letters to the Editors regarding this feature.
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