Study on characteristics and regularity of ruptured mitral chordae tendineae in color Doppler echocardiography
HOU Chuan-ju1, DENG Dong-an1, ZHU Xian-yang1, HAN Xiu-min1, YANG Jun2, LI Chun-hua2
1. Department of Congenital Heart Disease Internal, Shenyang Military General Hospital, Shenyang 110016, China; 2. Department of Ultrasound, Shenzhou Hospital of Shenyang Medical College, Shenyang 110020, China
Abstract：Objective: To probe into the imaging character and regularity of ruptured mitral chordae tendineae(RMCT) in color Doppler echocardiography(CDE). Methods: Thirty patients of RMCT were examined with CDE. Seven cases underwent angiocardiography. All cases were confirmed by operation. Results: Thirty cases were accurately diagnosed by imaging character of CDE. The features of CDE in RMCT: ①The ruptured chordae tendineae of mitral valve seems like flail on 2DE, named 2DE “flail sign”. ②M-mode echocardiography showed superimposed curve echo and trembling wave of mitral valve. ③For patients with mitral valve prolapse, a hammock-like prolapsed mitral valve can be seen on M-mode echocardiography and the prolapsed mitral valve protrude into left atrial on 2DE during systole. ④Pulse Doppler and continuous Doppler could record turbulent flow spectra from left atrial on top of mitral valve during systole. ⑤Color regurgitation flow through the mitral valve could be observed on CDFI during systole. ⑥The incidence rate of RMCT is much higher in male than in female and partial rupture accounts for larger proportion than complete rupture. Conclusions: The feature of CDE image in RMCT was obvious. CDE was valuable in diagnosing RMCT, but it should be differented from mitral valve prolapse and mitral valve vegetation.
2007, Vol. 18 
