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Quantitative determinants of the outcome of asymptomatic mitral regurgitation

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TLDR
Quantitative grading of mitral Regurgitation is a powerful predictor of the clinical outcome of asymptomatic mitral regurgitation and patients with an effective regurgitant orifice of at least 40 mm2 should promptly be considered for cardiac surgery.
Abstract
background The clinical outcome of asymptomatic mitral regurgitation is poorly defined, and the treatment is uncertain. We studied the effect on the outcome of quantifying mitral regurgitation according to recent guidelines. methods We prospectively enrolled 456 patients (mean [±SD] age, 63±14 years; 63 percent men; ejection fraction, 70±8 percent) with asymptomatic organic mitral regurgitation, quantified according to current recommendations (regurgitant volume, 66±40 ml per beat; effective regurgitant orifice, 40±27 mm 2 ). results The estimated five-year rates (±SE) of death from any cause, death from cardiac causes, and cardiac events (death from cardiac causes, heart failure, or new atrial fibrillation) with medical management were 22±3 percent, 14±3 percent, and 33±3 percent, respectively. Independent determinants of survival were increasing age, the presence of diabetes, and increasing effective regurgitant orifice (adjusted risk ratio per 10-mm 2 increment, 1.18; 95 percent confidence interval, 1.06 to 1.30; P<0.01), the predictive power of which superseded all other qualitative and quantitative measures of regurgitation. Patients with an effective regurgitant orifice of at least 40 mm 2 had a five-year survival rate that was lower than expected on the basis of U.S. Census data (58±9 percent vs. 78 percent, P=0.03). As compared with patients with a regurgitant orifice of less than 20 mm 2 , those with an orifice of at least 40 mm 2 had an increased risk of death from any cause (adjusted risk ratio, 2.90; 95 percent confidence interval, 1.33 to 6.32; P<0.01), death from cardiac causes (adjusted risk ratio, 5.21; 95 percent confidence interval, 1.98 to 14.40; P<0.01), and cardiac events (adjusted risk ratio, 5.66; 95 percent confidence interval, 3.07 to 10.56; P<0.01). Cardiac surgery was ultimately performed in 232 patients and was independently associated with improved survival (adjusted risk ratio, 0.28; 95 percent confidence interval, 0.14 to 0.55; P<0.01). conclusions Quantitative grading of mitral regurgitation is a powerful predictor of the clinical outcome of asymptomatic mitral regurgitation. Patients with an effective regurgitant orifice of at least 40 mm 2 should promptly be considered for cardiac surgery.

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Common Predisposing Factors in Mortality of Patients After Undergoing Mitral Valve Surgery at a Tertiary Care Hospital in Karachi.

TL;DR: The outcome of this study suggests that severe mitral regurgitation, pulmonary artery hypertension, high NYHA functional class, LV dysfunction, and prolonged symptoms were the common predisposing factor in patients with peri-operative mortality after isolated MVR.
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Benefits of sacubitril/valsartan use in patients with chronic heart failure after cardiac valve surgery: a single-center retrospective study

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Variation of Left Atrial Function in Different Stages of Mitral Regurgitation and Its Association With Guidelines-Based Surgical Indication.

TL;DR: The left atrial passive emptying fraction can be used as an additional tool to predict the indications of mitral valve surgery during mitral regurgitation.
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Left atrial size predicts outcome in severe but asymptomatic mitral regurgitation

TL;DR: In this paper , the authors determined the predictive value of the left atrial (LA) size in a large series of asymptomatic patients with severe primary mitral regurgitation (MR) and found that LA diameter was the strongest independent echocardiographic predictor of event-free survival.

Severe asymptomatic mitral regurgitation. About a case

TL;DR: The clinical evaluation of asymptomatic severe mitral failure patients remains controversial and is very much debated among outstanding experts.
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