P3739Differences in short-term outcome between balloon- and self-expandable TAVR devices relating to more than one generation
Abstract Background Transcatheter aortic valve replacement (TAVR) is the treatment option of choice in inoperable and high-risk patients and only recently even revealed favorable outcome in an intermediate risk cohort. Morbidity- and outcome relevant factors like paravalvular aortic regurgitation, vascular access complications and the need for permanent pacemaker implantation remain key challenges during balloon- and self-expandable valve-improvement. Purpose We aimed to address safety and effectiveness between balloon- and self-expandable TAVR devices relating to more than one generation. Methods Patients treated with TAVR between 2009 and 2018 were categorized into either balloon-expandable (BAVR, n=516) or self-expandable (SAVR, n=974) groups. TAVR endpoints and adverse events were defined according to the Valve Academic Research Consortium-2. Primary endpoint was 30-day mortality. Results Logistic EuroSCORE I as predictor for risk stratification and 30-day mortality was comparable between both cohorts (BAVR/SAVR: 25.7%±5.2 vs 25.5%±2.5; p=n.s). Compared to SAVR devices, BAVR devices had significantly higher periprocedural gradients (BAVR/SAVR: 11.7mmHg±0.1 vs 8.3mmHg±0.8; p=0.0175), lower incidence of new renal replacement therapy (BAVR/SAVR: 1.8% vs 4.6%; p=0.0025), and new permanent pacemaker therapy for conduction disturbances (BAVR/SAVR: 8.3% vs 17.3%; p<0.0001), but more frequently disabling bleeding (BAVR/SAVR: 3.9% vs 1.0%; p=0.0003) complications. 30-day mortality was significantly reduced in SAVR-patients (BAVR/SAVR: 4.4% vs 2.4%; p=0.0395). No difference could be observed concerning primary device success (BAVR/SAVR: 1.0%vs 2.0%; p=n.s.), incidence of moderate-to-severe paravalvular leakage (BAVR/SAVR: 3.2% vs 5.0%; p=n.s.), stroke (BAVR/SAVR: 3.3% vs 2.6%; p=n.s.), and major vascular complications (BAVR/SAVR: 2.7% vs 3.5%; p=n.s.). Conclusion Data from the retrospective analysis indicate lower incidence of renal replacement and pacemaker therapy, but higher periprocedural gradients, disabling bleeding complications, and enhanced 30-day mortality for the BAVR device as compared to SAVR. Other issues like paravalvular leackage/aortic regurgitation and stroke still remain unacknowledged.