[A transesophageal color-coded pulsed Doppler echocardiographic study of the spatial distribution of mitral regurgitation jets].

Objective: Transesophageal echocardiographic analysis of color Doppler characteristics of mitral valvular regurgitation jets.
Design: Transesophageal echocardiographic prospective study.
Setting: Ambulatory patients referred to Echocardiographic Laboratory of Gregorio Marañon General Hospital, Madrid, Spain.
Material and Methods: We studied a group of 100 consecutive patients with mitral regurgitation diagnosis. In each patient we calculated the degree of severity, percentage of wall intersection, maximal traced area, axis direction, atrial depth, maximal transversal diameter, perimeter and angle of the mitral regurgitation jet. We divided the entire population in three different groups according to the jet direction in central (CJ), eccentric (EJ) and wall jets (WJ).
Main Results: The direction of the mitral regurgitation jet was central in 49%, eccentric in 33% and impinging the left atrial wall in 18%. The mitral regurgitation jet angle was in the CJ 80 +/- 11 degrees, EJ 33 +/- 10 degrees and WJ 6 +/- 7 degrees. Maximal mitral regurgitant traced area in CJ was 732 +/- 104 mm2, EJ was 593 +/- 110 mm2 and WJ was 267 +/- 80 mm2. Maximal regurgitant jet depth in CJ was 36 +/- 17 mm, EJ 30 +/- 15 mm and WJ 49 +/- 14 mm. The perimeter of the mitral regurgitation jet in the CJ was 87 +/- 22 mm, EJ was 68 +/- 22 mm and WJ was 92 +/- 30 mm.
Conclusions: Color Doppler quantification criteria are not useful in all patients with mitral regurgitation jets. The presence of atrial walls close to the mitral regurgitation jet area is an important factor in the mitral regurgitation color Doppler evaluation.