Impact of Flow-Gradient Patterns on Outcomes of Transcatheter Aortic Valve Replacement for Severe Aortic Stenosis with Preserved Left Ventricular Ejection Fraction
Year: 2024
Type: article
Study design: Observational Study
Abstract: and mean pressure gradient ≥ 40 mmHg or peak velocity ≥ 4 m/second), low-flow high-gradient (LF-HG), and paradoxical low-flow low-gradient (pLF-LG) groups. Multivariable Cox regression hazard model was used to adjust for confounders.There were 525, 188, and 68 patients in the NF-HG, LF-HG, and pLF-LG groups, respectively. For the entire cohort, the median age was 82 years, and the periprocedural, 1-year, and 5-year mortality rates were 1.8%, 12%, and 48%, respectively. During a median follow-up period of 25 (range 0-72) months, the rates of all-cause mortality and the composite of all-cause mortality and rehospitalization for heart failure were significantly higher in the LF-HG group compared with the NF-HG group, with adjusted hazard ratios (HRs) of 1.41 (95% confidence interval: 1.02-1.92) and 1.35 (1.01-1.79), respectively. In contrast, there were no significant differences between the LF-NG and pLF-LG groups.In patients undergoing TAVR for severe AS and pEF, LF-HG AS had a higher risk of all-cause mortality and the composite outcome compared with NF-HG AS.
Source: International Heart Journal
DOI: 10.1536/ihj.24-284
Language: English
Subfield: Cardiology and Cardiovascular Medicine
Field: Medicine
Domain: Health Sciences
Open Access status: diamond
OpenAlex ID: W4404310396