title: ECG quiz: a challenging ECG in a patient with shortness of breath.
authors.forename: Akash
authors.initials: A
authors.lastname: Makkar
authors.forename: Yochai
authors.initials: Y
authors.lastname: Birnbaum
mesh_terms: D000368:Aged; D003937:Diagnosis, Differential; D004417:Dyspnea / Q000175:diagnosis* / Q000209:etiology*; D004562:Electrocardiography / Q000379:methods*; D016027:Heart Transplantation / Q000009:adverse effects*; D006801:Humans; D008297:Male; D018879:Ventricular Premature Complexes / Q000175:diagnosis* / Q000209:etiology*