Validation of flow convergence region method in assessing mitral valve area in the course of transthoracic and transesophageal echocardiographic studies

• Published in: The American heart journal 1998-02, Vol.135 (2), p.207-214
• Main Authors: Degertekin, Muzaffer, Basaran, Yelda, Gencbay, Murat, Yaymaci, Bengi, Dindar, Ismet, Turan, Fikret
• Format: Article
• Language: English
• Subjects: Adult; Aortic Valve Insufficiency - diagnostic imaging; Atrial Fibrillation - diagnostic imaging; Biological and medical sciences; Cardiovascular system; Echocardiography - methods; Echocardiography, Transesophageal - methods; Feasibility Studies; Female; Humans; Investigative techniques, diagnostic techniques (general aspects); Male; Medical sciences; Mitral Valve - diagnostic imaging; Mitral Valve Insufficiency - diagnostic imaging; Mitral Valve Stenosis - diagnostic imaging; Mitral Valve Stenosis - epidemiology; Monitoring, Intraoperative; Observer Variation; Reproducibility of Results; Rheumatic Heart Disease - diagnostic imaging; Rheumatic Heart Disease - epidemiology; Ultrasonic investigative techniques
• ISSN: 0002-8703; 1097-6744
• DOI: 10.1016/S0002-8703(98)70083-3

The purpose of this study was to determine the diagnostic value of flow convergence region method (FCR) to complement well-accepted techniques in assessing mitral valve area (MVA). Fifty-three patients (39 women, 14 men) were enrolled in the study. Transesophageal echocardiography (TEE) was performed after transthoracic echocardiographic (TTE) evaluation, and all measurements were performed for each patient. Mean MVA values determined by different methods both in TEE and TTE studies did not differ ( p = not significant). In 51 (96%) patients, TEE and TTE were feasible and measurements of MVA with FCR correlated well with the conventional methods ( r = 0.87, standard error of the estimate = 0.13 cm 2). In TEE, MVA determined by FCR also correlated well with that obtained by the “pressure half time” method ( r = 0.90, standard error of the estimate = 0.11 cm 2). Results of our study confirmed the feasibility and accuracy of FCR. Because TEE provides reliable estimation of MVA by FCR, intraoperative monitoring by TEE should be considered as a comparative alternative method. (Am Heart J 1998;135:207-14.)