ELECTROCARDIOGRAPHIC DIAGNOSIS OF LEFT VENTRICULAR HYPERTROPHY IN HYPERTENSION

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Abstract
The 12-lead ecg''s of 333 hypertensive subjects over the age of 40 years were studied. Six parameters of the ecg diagnosis of left ventricular hypertrophy were examined and the changes were related to the height of the blood pressure in these patients. The abnormalities indicating left ventricular hypertrophy were more common in the higher grades of hypertension. Approximately 25% of subjects with raised blood pressure were found to have none of these criteria for the diagnosis of left ventricular hypertrophy and may represent in this respect a benign form of hypertension or hypertonia. The most useful findings in the diagnosis of left ventricular hypertrophy in the 12-lead ecg appeared to be left axis deviation, T wave changes in the standard limb leads and V5 or V6, and a deep S of more than 15 mm amplitude in V1.