This electrocardiogram shows left atrial enlargement + biventricular hypertrophy.
The characteristic features of left atrial enlargement demonstrated here include broad, notched P waves in leads I, II, aVF, V4, V6 and V7. As well as a deep, negative terminal P wave component in leads V3R and V1.
The characteristic feature of right ventricular hypertrophy demonstrated here include tall, dominant R waves in precordial leads V3R and V1.
The characteristic feature of left ventricular hypertrophy demonstrated here in the presence of right ventricular hypertrophy is tall R waves in the left precordial leads.
Biventricular hypertrophy also is indicated by the large biphasic RS complexes in mid precordial leads V2 and V4.