Characteristic T-wave abnormalities transiently apparent during "normal" conduction in patients with intermittent left bundle branch block have been described1-5; the mechanism and clinical significance of these T-wave abnormalities remain uncertain. We describe a patient with intermittent left bundle branch block who demonstrated such T-wave abnormalities.
REPORT OF A CASE
A vigorous and asymptomatic 54-year-old man was refused insurance coverage because, he was told, his routine electrocardiogram (ECG) demonstrated "coronary arterial disease." He had a distant 40-pack-year history of cigarette smoking, having abstained for 20 years, and a family history of coronary artery disease in his father and paternal uncles, but he had no known history of hypertension, diabetes, or hyperlipidemia. Results of a routine physical examination and ECG two years earlier had been entirely normal.On examination, he appeared younger than his stated age, with a blood pressure of 150/90 mm Hg and a regular pulse of 70 beats