Search

BACKGROUND: We evaluated whether rivaroxaban alone or in combination with aspirin would be more effective than aspirin alone for secondary cardiovascular prevention.METHODS: In this double-blind trial, we randomly assigned 27,395 participants with stable atherosclerotic vascular disease to receive rivaroxaban (2.5 mg twice daily) plus aspirin (100 mg once daily), rivaroxaban (5 mg twice daily), or aspirin (100 mg once daily). The primary outcome was a composite of cardiovascular death, stroke, or myocardial infarction. The study was stopped for superiority of the rivaroxaban-plus-aspirin group after a mean follow-up of 23 months.RESULTS: The primary outcome occurred in fewer patients in the rivaroxaban-plus-aspirin group than in the aspirin-alone group (379 patients [4.1%] vs. 496 patients [5.4%]; hazard ratio, 0.76; 95% confidence interval [CI], 0.66 to 0.86; PCONCLUSIONS: Among patients with stable atherosclerotic vascular disease, those assigned to rivaroxaban (2.5 mg twice daily) plus aspirin had better cardiovascular outcomes and more major bleeding events than those assigned to aspirin alone. Rivaroxaban (5 mg twice daily) alone did not result in better cardiovascular outcomes than aspirin alone and resulted in more major bleeding events. (Funded by Bayer; COMPASS ClinicalTrials.gov number, NCT01776424 .).

Background Aortic stenosis (AS) is the most common valvular disease. Nowadays, the degenerative process including valve calcification is the main etiology. Severe AS is associated with poor prognosis and is an indication for aortic-valve intervention. While echocardiography is the main imaging tool to diagnose and quantify AS severity, computed tomography can also be used in difficult cases, and the aortic-valve calcification score is proposed as a proxy to quantify the disease severity. Nevertheless, different thresholds are proposed to grade AS. We performed systematic review and meta-analysis of studies using computed tomography to diagnose severe AS. Method Up to 30/11/2018, the key terms “aortic-valve”, “stenosis”, “computed tomography”, “calcification” or “calcium” were searched in PubMed. Our predefined inclusion criteria were clinical studies to diagnose severe AS by aortic-valve calcification derived from computed tomography. Studies including only native valves and providing cut-off levels for stenosis severity were included. The Agatston method were used and expressed in Agatston unit. Results Eleven from 534 studies, including 4,529 patients, were eligible. Population, AS severity, acquisition modalities and results were heterogenous. Aortic-valve calcification score was accurate to diagnose severe AS (pooled area under the curve = 0.89 ± 0.02). The cut-off levels differed between studies. With meta-analysis, the optimal cut-off was 1,648 AU for general population. Only three studies provided a cut-off per gender, with optimal value derived from meta-analysis of 1,354 AU for women and 2,048 AU for men. Conclusion Aortic-valve calcification score derived from computed tomography is useful to diagnose severe AS. It can provide supplementary data for evaluation of AS in patients with discordant echocardiographic findings. However, individual participant data meta-analysis is required to identify the most appropriate cut-off values with better accuracy.

International audience

Introduction: Global left ventricular (LV) afterload as assessed by valvulo-arterial impedance (Zva), may be an independent predictor of mortality in patients with severe aortic stenosis (AS) and preserved LV ejection fraction (LVEF). However, its quantification using echocardiography may be subject to error measurement. We aimed to determine the prevalence and impact on long-term survival of high Zva, purposely measured by cardiac catheterization. Methods and results: 676 patients with preserved LVEF and severe AS without other valvular heart diseases underwent cardiac catheterization. Zva was derived from catheterization and calculated as follows: mean aortic gradient + systolic blood pressure/ indexed LV stroke volume. Zva was considered high when > 5mmHg/mL/m(2) based on previous studies. Overall, high Zva was found in 42% of all AS patients. Four-year survival and 8-year survival were significantly reduced in patients with high Zva (74 +/- 3% and 57 +/- 4%) as compared to those with low Zva (85 +/- 2% and 74 +/- 3%; p = 0.002). After adjustment for all other risk factors, Zva was independently associated with reduced long-term survival (hazard ratio [HR] = 1.47 95% CI: 1.04-2.09; p = 0.029). Of interest, high Zva remained associated with reduced survival as compared to low Zva, in patients with normal LV stroke volume, but was no longer significant in low flow patients (p = 0.98). Conclusion: High Zva, estimated invasively in our study, is frequent in patients with severe AS, and appears as a robust and independent predictor of survival. Zva should be used as an additional parameter for risk stratification of severe AS, more particularly in patients with normal flow. (C) 2014 Elsevier Ireland Ltd. All rights reserved.

Background Cardiac involvement in systemic light-chain amyloidosis (AL) is characterized by 2D-echocardiography (TTE) normal or slithly decreased left ventricular (LV) ejection fraction and typically a diastolic dys-function with left atrial (LA) enlargement. To assess cardiac involvement, the Mayo Clinic staging (MC) using NTproBNP and troponin, has been validated and allows risk stratification of patients into 3 groups with different outcomes. Cardiac magnetic resonance (CMR) assesses accurately chambers size and function. We aimed to compare by TTE and by CMR respectively: features of LV systolic and diastolic function and by CMR, morphological functional parameters namely LV myocardial late gadolinium enhancement (LGE) and indexed max LA volume (LAVi) and emptying fraction (LAEF). Methods and results Forty-two consecutive patients (66±10 years, 57% males) in sinus rhythm with confirmed systemic AL, underwent simultaneously TTE and CMR within 24 hours. LAEF was calculated after assessing the maximal and minimal LAVi (by area/length formula) in CMR using 4 and 2 chambers views. Diastolic parameters and 2D-LV global longitudinal strain (GLS) obtained by TTE were stratified according to LAEF, to LAVi and to the presence or not of LGE. Patients in MC stage III had the worse TTE and CMR parameters. LV GLS (–10.1±3.1 vs. –17.3±3.7, p Conclusion In systemic AL, reduced LV GLS is associated with presence of LGE while impaired LV filling pressures are rather related to decreased LA emptying fraction. Multimodality imaging in patients with AL may allow better and complementary assessment of LV hemodynamics. Abstract 0430 - Table LA Emptying fraction CMR Maximal LAVICMR LGE >17.5% p >44 ml/m2 p – + p Mitral E/A ratio 2.98±1.82 0.89±0.28 1.51±1.4 2.22±1.8 0.2 1.35±1.3 2.43±1.9 0.055 DT TTE (ms) 158±45 217±56 190±65 183±53 0.7 219±51 145 ±39 Lateral E/e’ 16.9±6.8 12.1±6.4 14±7 14.8±7 0.8 13.6±7.4 15.7±6.4 0.4 GLS –10.1±3.1 –17.3±3.7 –14.2±5 –12.7±4.6 0.4 –16.5±5.2 –10.8±2.8

Background— Patients with severe aortic stenosis (AS) and paradoxical low flow (PLF) have worse outcome compared with those with normal flow. Furthermore, prosthesis–patient mismatch (PPM) after aortic valve replacement is a predictor of reduced survival. However, the prevalence and prognostic impact of PPM in patients with PLF-AS are unknown. We aimed to analyze the prevalence and long-term survival of PPM in patients with PLF-AS. Methods and Results— Between 2000 and 2010, 677 patients with severe AS, preserved left ventricular ejection fraction, and aortic valve replacement were included (74±8 years; 42% women; aortic valve area, 0.69±0.16 cm 2 ). A PLF (indexed stroke volume ≤35 mL/m 2 ) was found in 26%, and after aortic valve replacement, 54% of patients had PPM, defined as an indexed effective orifice area ≤0.85 cm 2 /m 2 . The combined presence of PLF and PPM was found in 15%. Compared with patients with noPLF/noPPM, those with PLF/PPM were significantly older, with more comorbidities. They also received smaller and biological bioprosthesis more often (all P P =0.002), even after multivariable adjustment (hazard ratio, 2.58; 95% confidence interval, 1.5–4.45; P =0.0007). Conclusions— In this large catheterization-based study, the coexistence of PLF-AS before surgery and PPM after surgery is associated with the poorest outcome.

IntroductionThe non-invasive assessment of left ventricular (LV) filling and LA pressure in patients with aortic stenosis (AS) remains challenging. The aim of our study was to identify the echocardiographic parameters that may predict elevated pulmonary capillary wedge pressures (PCWP) measured by cardiac catheterization in patients with severe AS without other valve disease.Methods and resultsFrom January 2010 to December 2012, we included 85 consecutive patients with severe AS scheduled for clinically indicated cardiac catheterization study. Comprehensive transthoracic echocardiography (TTE) was performed in all patients within 24 hours of the hemodynamic study. Mean age was 75±9 years, 65% of them were male, 65%, 22% and 54% had respectively a history of hypertension, diabetes, and dyslipidemia. NYHA functional class was≥III in 63% of patients. By TTE, mean LV ejection fraction, max left atrial (LA) volume indexed, were respectively 60±9%, and 38±16mL/m 2. Mean mitral septal E/e’ ratio was 18.6±9. Cardiac catheterization found 60% cases of coronary artery disease and the mean PCWP was 13.5±7mmHg. As compared to patients with low PCWP (29ml/m 2 predicted a PCWP>13mmhg with a sensitivity of 77% and a specificity of 62% (area under the curve=0.73). Similarly, mitral annular septal E/e’>12 predicted PCP>13mmHg with a sensitivity of 90% and a specificity of 60% (area under the curve=0.73).ConclusionIn severe AS patients, maximal LA indexed volume>29/ml/m2 and E/e’ ratio>12, derived from TTE, appear as good markers of elevated PCWP. Further studies are needed to investigate their prognostic values.

BackgroundThe global left ventricular (LV) hemodynamic afterload as assessed by valvulo arterial impedance (Zva), may be an independent predictor of mortality in patients with severe aortic stenosis (AS) and preserved LV ejection fraction (LVEF). However, its quantification using echocardiography may be subject to error measurement. The aim of this study is to determine the prevalence and impact on long-term survival of high Zva, purposely measured by cardiac catheterization.Methods and results768 patients with preserved LVEF (>50%) and severe AS (valve area ≤1cm²) underwent cardiac catheterization. Zva was derived from catheterization data and calculated using validated formula. Zva was considered high when >5mmHg/ml/m2. Overall, high Zva was found in 42% of all AS patients.Patients with high Zva were significantly older (p60mL: 49±8vs. 69±4%, p=0.012; ≤60mL: 49±7 vs. 53±13%, p=0.96).ConclusionIn this large cardiac catheterization-based study, high Zva estimated invasively is frequent in patients with severe AS, and appears as a robust and independent predictor of survival.