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Two patients with inferior infarction complicated by right ventricular infarction are presented. Both manifested electrocardiographic changes involving the anterior chest leads with initial S-T segment elevation followed by loss of R waves and the development of QS complexes mimicking anterior infarction. Cardiac catheterization showed right coronary artery occlusion with normal left coronary system and anterior wall motion in each case. Radionuclide angiocardiography showed dilated poorly contracting right ventricles. The ECG changes of “anterior infarction” in these patients were therefore due solely to right ventricular injury.

A 61-year-old man with hypertrophic cardiomyopathy developed acute pulmonary edema 29 h following cardioversion of chronic atrial fibrillation to sinus rhythm. Doppler echocardiographic evaluation of atrial function showed return of right atrial contraction but absent left atrial systole. This has not been reported previously in a case of postcardioversion pulmonary edema.

Thrombosis of a St. Jude mediad prosthesis in the mitral position resulted in severe pulmonary edema in a 47-year-old woman 23 days after implantation. The diagnostic importance of the finding of a diastolic murmur across the prosthesis and the value of fluoroscopy in the diagnosis of malfunction are emphasized.