Early left ventricular regional contractile impairment in chronic mitral regurgitation occurs in a consistent, heterogeneous pattern
نویسندگان
چکیده
منابع مشابه
Left ventricular contractile reserve in asymptomatic primary mitral regurgitation.
AIMS There are very few data regarding the assessment and prognostic value of left ventricular contractile reserve (LVCR) in asymptomatic patients with primary mitral regurgitation (MR). We aimed to quantify LVCR and to evaluate its usefulness for risk stratification in asymptomatic patients with primary MR. METHODS AND RESULTS Comprehensive resting and exercise (EX) transthoracic echocardiog...
متن کاملRegional left ventricular deformation in primary mitral regurgitation
Introduction MVP is a common disorder affecting 2-3% of the general population. MVP patients with severe MR may remain asymptomatic for a number of years; however, LV systolic function may be impaired post-operatively, even among those with normal pre-operative ejection fraction (EF). Myocardial strain is the assessment of myocardial local deformation and may provide a more accurate assessment ...
متن کاملMechanics of left ventricular contraction in chronic severe mitral regurgitation.
The mechanics of left ventricular contraction were studied during diagnostic cardiac catheterization using high-speed cineangiography in 11 patients with severe chronic mitral regurgitation. Compared with a group of previously studied normal subjects, most of the patients with mitral regurgitation demonstrated a reduced velocity of shortening (Vf) during ejection at maximum wall stress, average...
متن کاملCellular and ventricular contractile dysfunction in experimental canine mitral regurgitation.
This study was designed to answer two questions. First, does the left ventricular contractile dysfunction resulting from mitral regurgitation (MR) reflect a primary defect in the cardiac muscle cell? Second, what is the basis for any change in cellular contractile function that might be observed? Left ventricular volume overload was produced in 10 dogs by catheter transection of mitral chordae ...
متن کاملFunctional and prognostic implications of left ventricular contractile reserve in patients with asymptomatic severe mitral regurgitation.
OBJECTIVE To evaluate contractile reserve (CR) determined by exercise echocardiography in predicting clinical outcome and left ventricular (LV) function in asymptomatic severe mitral regurgitation (MR). DESIGN Cohort study. SETTING Regional cardiac centre. PATIENTS AND OUTCOME MEASURES LV volumes and ejection fraction (EF) were measured at rest and after stress in 71 patients with isolate...
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ژورنال
عنوان ژورنال: The Journal of Thoracic and Cardiovascular Surgery
سال: 2014
ISSN: 0022-5223
DOI: 10.1016/j.jtcvs.2014.05.088