Study on characteristics and regularity of ruptured mitral chordae tendineae in color Doppler echocardiography

HOU Chuan-ju; DENG Dong-an; ZHU Xian-yang; HAN Xiu-min; YANG Jun; LI Chun-hua

Journal of China Clinic Medical Imaging ›› 2007, Vol. 18 ›› Issue (11) : 768-770.

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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

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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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mitral valve / heart disease / echocardiography / Doppler / color

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HOU Chuan-ju;DENG Dong-an;ZHU Xian-yang;HAN Xiu-min;YANG Jun;LI Chun-hua. Study on characteristics and regularity of ruptured mitral chordae tendineae in color Doppler echocardiography[J]. Journal of China Clinic Medical Imaging. 2007, 18(11): 768-770