[Electrocardiographic characteristics of an anomalous origin of the left coronary artery from the pulmonary trunk].

Electrocardiographic characteristics of abnormal left coronary arterial branching (ALCAB) from the pulmonary trunk were examined in 36 patients, aged 2 months to 39 years. Signs of marked left-ventricular and left-atrial overstrain were typical for all ages. There were signs of past left ventricular myocardial infarction in 88.8% of patients, the cicatricial changes being anterolateral in 65.6%, which is typical for the defect. The follow-up of ECG pattern over 1 month to 8 years after the defect was first detected demonstrated that coronary circulation deteriorated in 64.3% of cases.