Retrospective evaluation of echocardiography in mechanical prosthesis valve dysfunction / 中华超声影像学杂志

ABSTRACT

Objective To evaluation the diagnostic value of echocardiography in mechanical prosthesis valve dysfunction(MPVD).Methods Fifty-two patients who underwent reoperation due to MPVD were included,and the preoperative,introperative and postoperative results of echocardiography was compared with the results of surgery or pathologic diagnosis.Results The etiology of MPVD based on cardiac surgery was thrombus in 12,fibrous tissue hyperplasia in 23,thrombus and fibrous tissue hyperplasia in 16,lost of mechanical disc in 1.The types of MPVD diagnosed by echocardiography were stenosis in 29,regurgitation in 2,stenosis and regrigitation in 12,intermittent obstruction in 8,and total obstruction in 1.Successful assessment of prosthetic disc by transthoracic echocardiography was 78.4％ and can be improved to 96.1 ％ when combined with transesophageal echocardiography.Complementary message by transesophageal echocardiography were provided in 10 patients and corrective message in 1 patient.No recurrent MPVD was find during the follow-up.Conclusions Echocardiography can be used as the frist choice for the evaluation of the MPVD and can make precise assessment of the abnormal hemodynamic change and state of motion of the valve.