THE ELECTROCARDIOGRAM IN LATER LIFE

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Abstract
The increasing number of persons who are attaining the age of 70 and the frequency with which they suffer attacks of acute coronary occlusion make it expedient that certain standards of normalcy be established electeocardiographically for this age group. The series of records presented here was assembled in an attempt to determine what constitutes a normal electrocardiogram for an elderly person without symptoms of cardiovascular disease. MATERIAL One hundred persons over 70 years of age were selected for this study. Accurate and painstaking histories were obtained in order to eliminate any one who had manifestations of impaired cardiac function other than that which could be properly ascribed to aging alone. All persons without physical signs of cardiovascular disease except mild hypertension (pressure not exceeding 150 mm. of mercury systolic and 90 mm. diastolic) and moderate ventricular enlargement with an apical impulse palpable less than 12 cm. to the left of

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