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| Study on image characteristics and regularity of isolated single atrium 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. Shenzhou Hospital, Shenyang Medical College, Shenyang 110020, China |
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Abstract Objective: To investigate the imaging character and regularity of isolated single atrium(ISA) in color Doppler echocardiography(CDE). Methods: Thirty patients of ISA were examined with CDE. Fourteen cases of them underwent angiocardiography for correlation. All of the cases were confirmed by operation. Results: Twenty-seven cases were accurately diagnosed by CDE image with the diagnostic accuracy rate of 90.0%. The other 3 cases were misdiagnosed as partial atrioventricular septal defect. The features of CDE image in ISA had obvious characteristics: ①The parasternal long-axis view of left ventricle by 2DE showed an enlarged right ventricle and elongation and narrowing of the left ventricle outflow tract. The apical four-chamber view showed echo dropout in the interatrial septum, closure of the mitral and tricuspid valve during systole and the substitution of normal “cross” image by a “upside-down T” sign. Parasternal short axis view at the mitral valve level in 2DE showed a “broken bridge”-like anterior mitral leaflet. ②M-mode ECG showed equidirectional movement of the interventricular septum and the posterior left ventricular wall, narrowing of the outflow tract of left ventricule and a double-curve echo of the anterior leaflet of mitral valve. ③Continuous-wave Doppler assessments of pulmonary artery pressure were more than 30mmHg in all the cases. ④Color Doppler flow imaging showed colorful regurgitation flow through the mitral valve and the tricuspid valve during systole and through the pulmonary valve during diastole. Conclusions: The feature of CDE image in ISA is obvious and is valuable in diagnosis for ISA, but it should be differentiated from partial atrioventricular septal defect.
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Received: 07 September 2006
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2007, Vol. 18 
