Nghiên cứu chức năng thất trái ở bệnh nhân tăng huyết áp bằng siêu âm Doppler mô cơ tim

Tissue Doppler Imaging (TDI) has evolved to become a useful non invasive method that can complement other echocardiographic techniques in the assessment of left ventricular functions in different clinical conditions. In this study, TDI was applied to measure the myocardial wall velocities along different left ventricular planes and to evaluate the left ventricular function in essential hypertension. Subjects and Methods: the authors evaluated 223 patients with traditional echocardiography and TDI; among them, 90 as normal control subjects (Group A); 133 patients with hypertension were divided according to echocardiographic evaluation basis, sq patients without evidence of ventricular hypertrophy (Group B) and 53 patients with evidence of ventricular hypertrophy (Group C). Results: TDI showed a progressive systolic wave peak reduction from Group A to B and from Group B to C. TDI showed progressive E wave peak velocity decrease and E/Em increase from Group A to B and C, and from Group B to C. Conclusions: TDI evaluation showed a ventricular systodiastolic dysfunction in the patients with hypertensive cardiomyopathy; in addition, an early mild systodiastolic dysfunction was detected in the subjects with hypertension but no evidence of hypertensive cardiomyopathy.