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| 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 |
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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.
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Received: 30 April 2007
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2007, Vol. 18 
