Decrease in left atrium volume after successful balloon mitral valvuloplasty: an echocardiographic and hemodynamic study.

BACKGROUND: Left atrium (LA) remodeling has a crucial adverse impact on outcome and prognosis in mitral stenosis. Few studies have reported the effect of balloon mitral valvuloplasty (BMV) on LA volume. The aim of this study was to assess the evolution of LA volume immediately and 1 month after successful BMV in patients in sinus rhythm. METHODS: Thirty-three consecutive patients (70% women; age 31 ± 8 years; range 19-45) with moderate to severe mitral stenosis (mitral valve area ≤1.5 cm(2) ) who underwent successful BMV were included prospectively. Using two-dimensional echocardiography, and according to the prolate ellipse method, LA volume and LA volume indexed to body surface area were determined before BMV, and 24 hours and 1 month after BMV. Tricuspid and pulmonary regurgitation jets were recorded systematically using continuous-wave Doppler. Pulmonary artery-right ventricular (PA-RV) gradients, reflecting pulmonary pressures, and pulmonary vascular resistance were measured. RESULTS: Mitral valve area increased from 0.88 ± 0.16 to 1.55 ± 0.26 cm(2) (P < 0.0001). Mean mitral valve gradient (MVG) decreased from 16 ± 6 to 6 ± 2 mmHg (P < 0.0001) immediately after BMV. Indexed LA volume fell from 56 ± 14 to 48 ± 12 mL/m(2) (P = 0.0002) immediately after BMV and to 45 ± 13 mL/m(2) at 1 month (P < 0.0001). Only patients with a median LA volume ≥55 mL/m(2) before BMV had a significant reduction in LA volume (P = 0.0001). Decrease in LA volume was correlated with decreases in PA-RV peak diastolic gradient (r = 0.45, P = 0.008) and MVG (r = 0.35, P = 0.04). CONCLUSION: In patients with mitral stenosis in sinus rhythm, successful BMV results in an immediate decrease in LA volume. This reduction, maximal immediately after BMV, correlates with decreases in MVG and PA-RV peak diastolic gradient, and is significant only when LA volume before BMV is severely enlarged.

Correlation between left atrial spontaneous echocardiographic contrast and 5-year stroke/death in patients with non-valvular atrial fibrillation.

BACKGROUND: Transthoracic echocardiography (TTE) and transoesophageal echocardiography (TOE) can be used to detect the presence of left atrial thrombus and left atrial spontaneous echocardiographic contrast (LASEC). AIM: To evaluate the prognostic value of TTE and TOE in predicting stroke and all-cause death at 5-year follow-up in patients with non-valvular atrial fibrillation (NVAF). METHODS: This study included patients hospitalised with electrocardiography-diagnosed NVAF in Saint-Antoine University Hospital, Paris, between July 1998 and December 2011, who underwent TTE and TOE evaluation within 24hours of admission. Cox proportional-hazards models were used to identify predictors of the composite outcome (stroke or all-cause death). RESULTS: During 5 years of follow-up, stroke/death occurred in 185/903 patients (20.5%). By multivariable analysis, independent predictors of stroke/death were CHA2DS2-VASc score (hazard ratio [HR] 1.35, 95% confidence interval [CI] 1.25-1.47; P<0.001), left atrial area>20 cm2 (HR 1.59, 95% CI 1.08-2.35; P=0.018), moderate LASEC (HR 1.72, 95% CI 1.13-2.62; P=0.012) and severe LASEC (HR 2.04, 95% CI 1.16-3.58; P=0.013). Independent protective predictors were dyslipidaemia (HR 0.60, 95% CI 0.43-0.83; P=0.002) and discharge prescription of anti-arrhythmics (HR 0.59, 95% CI 0.40-0.87; P=0.008). Adding LASEC to the CHA2DS2-VASc score modestly improved predictive accuracy and risk classification, with a C index of 0.71 vs. 0.69 (P=0.004). CONCLUSIONS: In this retrospective monocentric study, the presence of moderate/severe LASEC was an independent predictor of stroke/death at 5-year follow-up in patients with NVAF. The inclusion of LASEC in stroke risk scores could modestly improve risk stratification.

HIV Infection and Long-Term Residual Cardiovascular Risk After Acute Coronary Syndrome.

Background It is unclear whether HIV infection affects the long-term prognosis after an acute coronary syndrome (ACS). The objective of the current study was to compare rates of major adverse cardiac and cerebrovascular events after a first ACS between people living with HIV (PLHIV) and HIV-uninfected (HIV-) patients, and to identify determinants of cardiovascular prognosis. Methods and Results Consecutive PLHIV and matched HIV- patients with a first episode of ACS were enrolled in 23 coronary intensive care units in France. Patients were matched for age, sex, and ACS type. The primary end point was major adverse cardiac and cerebrovascular events (cardiac death, recurrent ACS, recurrent coronary revascularization, and stroke) at 36-month follow-up. A total of 103 PLHIV and 195 HIV- patients (mean age, 49 years [SD, 9 years]; 94.0% men) were included. After a mean of 36.6 months (SD, 6.1 months) of follow-up, the risk of major adverse cardiac and cerebrovascular events was not statistically significant between PLHIV and HIV- patients (17.8% and 15.1%, P=0.22; multivariable hazard ratio [HR], 1.60; 95% CI, 0.67-3.82 [P=0.29]). Recurrence of ACS was more frequent among PLHIV (multivariable HR, 6.31; 95% CI, 1.32-30.21 [P=0.02]). Stratified multivariable Cox models showed that HIV infection was the only independent predictor for ACS recurrence. PLHIV were less likely to stop smoking (47% versus 75%; P=0.01) and had smaller total cholesterol decreases (-22.3 versus -35.0 mg/dL; P=0.04). Conclusions Although the overall risk of major adverse cardiac and cerebrovascular events was not statistically significant between PLHIV and HIV- individuals, PLHIV had a higher rate of recurrent ACS. Registration URL: https://www.clini​caltr​ials.gov; Unique identifier: NCT00139958.