Quantification of Mitral Regurgitation
نویسندگان
چکیده
Background. In clinical color Doppler examinations, mitral regurgitant jets are often observed to impinge on the left atrial wall immediately beyond the mitral valve. In accordance with fluid dynamics theory, we hypothesized that a jet impinging on a wall would lose momentum more rapidly, undergo spatial distortion, and thus have a different observed jet area from that of a free jet with an identical flow rate. Methods and Results. To test this hypothesis in vivo, we studied 44 patients with mitral regurgitation -30 with centrally directed free jets and 14 with eccentrically directed impinging wall jets. Maximal color jet areas (cm2) (with and without correction for left atrial size) were correlated with mitral regurgitant volumes, flow rates, and fractions derived from pulsed Doppler mitral and aortic forward flows. The groups were compared by analysis of covariance. Mean+SD mitral regurgitant fraction, regurgitant volume, and mean flow rate averaged 37±17%, 3.06±2.65 1/min, and 147±118 ml/sec, respectively. The maximal jet area from color Doppler imaging correlated relatively well with the mitral regurgitant fraction in the patients with free mitral regurgitant jets (r=0.74, p<O0.0O1) but poorly in the patients with impinging wall jets (r=0.42, p=NS). Although the mitral regurgitant fraction was larger (p<0.05) in patients with wall jets (44±20%1) than in those with free jets (33+15%), the maximal jet area
منابع مشابه
اثر PercutaneousCoronary Intervention Elective بر بهبودی نارسایی ایسکمیک میترال
Introdution: Ischemic mitral regurgitation (IMR) remains one of the most complex and unresolved aspects of ischemic heart disease that the impact of percutaneous coronary intervention (PCI) on improvement of intensity of ischemic mitral regurgitation is not well clarified. Patients with coronary artery diseases and ischemic mitral regurgitation have a worse prognosis than the patients with coro...
متن کاملMitral valve blood flow quantification by 7D phase contrast SSFP - a feasibility study
Purpose: to assess the feasibility of a new 7D PC-SSFP sequence for single acquisition mitral regurgitation volume quantification. Materials and Methods: The 7D PC-SSFP sequence implementation is based on a regular 3D balanced SSFP gradient scheme with velocity encoding. Accuracy of velocity quantification was confirmed using a flow-phantom. Mitral volume flow was measured in ten healthy subjec...
متن کاملSHORT TERM CLINICAL OUTCOME OF PERCUTANEOUS BALLOON MITRAL VALVULOPLASTY VERSUS SURGICAL CLOSED MITRAL COMMISSUROTOMY
BaIlon mitral valvuloplasty and closed mitral valve conunissurotomy were performed in 450 and 127 patients, respectively. Also, 254 patients with severe mitral stenosis were enrolled in a prospective randomized trial comparing the two procedures. Immediately after balloon mitral valvuloplasty, mean left atrial pressure was 11.38±3.54 mmHg, transmitral valve gradient was 1.8±2 mmHg, and mit...
متن کاملDifferential Impact of Three-Dimensional Color Doppler Echocardiography for the Quantification of Mitral Regurgitation According to the Severity and Characteristics Choi et al: Impact of 3D Quantification of Mitral Regurgitation
متن کامل
Quantitative Assessment of Mitral Regurgitation: Comparison Between Three-dimensional Transesophageal Echocardiography and Magnetic Resonance Imaging Running Title: Shanks et al: Mitral regurgitation quantification: 3D TEE vs. MRI
متن کامل
A New Method to Quantify Mitral Regurgitation
INTRODUCTION In cases of mitral regurgitation, the severity of the regurgitation is the major determinant of progression to left ventricular dilatation and dysfunction. Therefore, precise measurement of regurgitant volume in patients with mitral regurgitation is important for evaluating the progression of the disease which can then determine the optimal time for surgical repair or replacement. ...
متن کامل