72 hypertensive patients have been studied by means of M-Mode echocardiography. The results of our study have shown that a consisting number of hypertensives exhibits signs of left atrial enlargement, an increase of the myocardial mass and of the thickness of the posterior wall. The diastolic indices resulted more precociously impaired as compared to the systolic ones. Finally a positive correlation was found between left atrial enlargement, myocardial mass on one hand and mean blood pressure on the other, and between atrial enlargement and myocardial mass.