New Classification of Heart Failure Severity Using Mitral Annulus Displacement Measured by tissue-tracking Method With Doppler-tissue Images
Year: 2007
Type: article
Study design: Observational Study
Abstract: Objectives.The purpose of this study was to determine whether the assessment of mitral annulus displacement (MAD) using Doppler-tissue image (DTI) could provide a useful marker of heart failure severity.[Methods] In seventy-five subjects with heart diseases, we measured MAD by tissue-tracking method with DTI.MAD was evaluated in both septal and lateral corners of the mitral annulus in the apical 4-chamber view, and the degree of MAD in postsystolic phase was estimated as a ratio of displacement at aortic valve closure and peak point (P/A ratio).We divided subjects into three groups (group A: subjects with preserved MAD, group B: subjects with reduced MAD without increasing P/A ratio, group C: subjects with reduced MAD with increasing P/A ratio) and compared NYHA functional class and left ventricular ejection fraction (LVEF).Results.NYHA functional class and LVEF were significantly different among the three groups (NYHA functional class; group A: 1.2±0.4,group B: 2.3±0.9, group C: 3.1±0.8,LVEF; group A: 58±12 %, group B: 42±15 %, group C: 25± 8 %).These results indicated that MAD which represents mainly LV longitudinal function is decreased in the first place, and then, post-systolic displacement is exaggerated according to the severity of heart failure. Conclusions.The classification of the degree and timing of peak MAD (P/A ratio) is well correlated with NYHA functional class and LVEF and becomes one of the useful indexes of heart failure severity.
Source: Journal of Echocardiography
DOI: 10.2303/jecho.5.105
Institution: Kyushu Hospital
Language: English
Subfield: Cardiology and Cardiovascular Medicine
Field: Medicine
Domain: Health Sciences
Open Access status: bronze
OpenAlex ID: W2066469764