Background: Central sleep apnea (CSA) is a common comorbidity in patients with heart failure (HF) and has been linked to increased morbidity and mortality risk. In addition, CSA is associated with impaired quality of life, reduced physical performance capacity, and hypoxemia. Phrenic nerve stimulation (PNS) is a novel approach to the treatment of CSA and has been shown to be safe and effective in this indication. However, there are currently no data on the effects of PNS on physical performance and hypoxia in CSA HF patients, both of which have been shown to be linked to mortality in HF. Methods: This prospective study enrolled patients with HF and CSA diagnosed using polysomnography. All were implanted with a PNS system (remedē^® system, Respicardia Inc., Minnetonka, MN, USA) for the treatment of CSA. Examinations included polysomnography (to determine hypoxemic burden), echocardiography and a standardized 6-min walk test prior to device implantation (baseline) and after 6 months of follow-up. Results: A total of 24 patients were enrolled (mean age 67.1 ± 11.2 years, 88% male). The 6-min walk distance was 369.5 ± 163.5 m at baseline and significantly improved during follow-up (to 410 ± 169.7 m; p = 0.035). Hypoxemic burden, determined based on time with oxygen saturation < 90% improved from 81 ± 55.8 min at baseline to 27.9 ± 42.8 min during PNS therapy (p < 0.01). Conclusion: In addition to safely and effectively treating CSA, PNS is also associated with improved physical performance capacity and reduced hypoxemic burden in patients with HF.

Background: Treatment of severely calcified aortic valve stenosis is associated with a higher rate of paravalvular leakage (PVL) and permanent pacemaker implantation (PPI). We hypothesized that the self-expanding transcatheter heart valve (THV) prostheses Evolut Pro (EPro) is comparable to the balloon-expandable Sapien 3 (S3) regarding hemodynamics, PPI, and clinical outcome in these patients. Methods: From 2014 to 2019, all patients with very severe calcification of the aortic valve who received an EPro or an S3 THV were included. Propensity score matching was utilized to create two groups of 170 patients. Results: At discharge, there was significant difference in transvalvular gradients (EPro vs. S3) (dPmean 8.1 vs. 11.1 mmHg, p ≤ 0.001) and indexed effective orifice area (EOAi) (1.1 vs. 0.9, p ≤ 0.001), as well as predicted EOAi (1 vs. 0.9, p ≤ 0.001). Moderate patient prosthesis mismatch (PPM) was significantly lower in the EPro group (17.7% vs. 38%, p ≤ 0.001), as well as severe PPM (2.9% vs. 8.8%, p = 0.03). PPI and the PVL rate as well as stroke, bleeding, vascular complication, and 30-day mortality were comparable. Conclusions: In patients with severely calcified aortic valves, both THVs performed similarly in terms of 30-day mortality, PPI rate, and PVL occurrence. However, patient prothesis mismatch was observed more often in the S3 group, which might be due to the intra-annular design.

Accurate risk stratification is crucial for patients undergoing transcatheter tricuspid valve intervention (TTVI). The performance of existing surgical and TTVI risk scores (TRI-SCORE, STS-TR [Society of Thoracic Surgeons Tricuspid Regurgitation], and TRIVALVE [International Multisite Transcatheter Tricuspid Valve Therapies Registry]) has not been comprehensively evaluated and compared in a contemporary, real-world cohort. The aim of this study was to assess the discrimination and calibration of these scores in a large international multicenter population of patients undergoing TTVI. This study population included 457 patients from 6 international centers who underwent TTVI (tricuspid transcatheter edge-to-edge repair, transcatheter tricuspid valve replacement, or transcatheter tricuspid annuloplasty) between 2019 and 2024. The performance of the TRIVALVE score was assessed for the 1-year endpoint of death and rehospitalization. The TRI-SCORE and STS-TR scores were assessed for in-hospital and 30-day mortality, respectively. Performance was evaluated using C statistics for discrimination and smoothed calibration plots for calibration. All 3 scores demonstrated limitations. The TRIVALVE score showed low discrimination (area under the curve: 0.609) and was well calibrated after its endpoint was refined to exclude non-cardiovascular-related hospitalizations. The surgically derived TRI-SCORE and STS-TR scores were miscalibrated and significantly overestimated mortality. The TRI-SCORE showed an observed-to-expected mortality ratio of 0.13 (95% CI: 0.07-0.23), and the STS-TR score had an observed-to-expected mortality ratio of 0.35 (95% CI: 0.19-0.60). The currently available TTVI risk scores derived from surgical or early TTVI cohorts may not be well suited for accurate risk assessment in contemporary TTVI. The surgical scores when applied to TTVI are miscalibrated, and the TRIVALVE score lacks discrimination. There is a need for the development of a contemporary dedicated TTVI risk model validated specifically for this population.

Background: Aortic stenosis (AS) and coronary artery disease (CAD) frequently coexist, requiring careful revascularisation strategy consideration. While surgical aortic valve replacement (SAVR) plus coronary artery bypass grafting (CABG) is traditional, transcatheter aortic valve replacement (TAVR) plus percutaneous coronary intervention (PCI) is increasingly used. The optimal strategy, particularly regarding residual CAD burden, remains unclear. Objectives: This study investigated the impact of residual SYNTAX (Synergy between Percutaneous Coronary Intervention with Taxus and Cardiac Surgery) score (rSS) on outcomes in men and women with AS and CAD undergoing TAVR+PCI versus SAVR+CABG. Methods: In this retrospective study, propensity score-matched cohorts of men and women undergoing either procedure were analysed. Matching variables included age, left ventricular ejection fraction, EuroSCORE II (European System for Cardiac Operative Risk Evaluation II) and CAD severity. Results: 398 patients (114 women and 284 men) were included. The rSS was predictive of the primary composite endpoint in the TAVR+PCI group (p=0.006 women and p<0.001 men) but not in the SAVR+CABG group. In patients achieving an rSS<8, TAVR+PCI was associated with a lower combined endpoint rate compared with SAVR+CABG, consistent across genders (p=0.02). Furthermore, TAVR+PCI demonstrated significant safety benefits, including lower rates of major bleeding in men (2.1% vs 10.6%) and stroke in women (1.8% vs 12.3%). Conclusions: The prognostic importance of the rSS is strategy-dependent. For patients undergoing TAVR+PCI, achieving extensive revascularisation (rSS <8) is a critical procedural goal associated with improved outcomes. For patients undergoing SAVR+CABG, prognosis appears driven more by baseline clinical risk.