The Impact of Left Ventricular Diastolic Dysfunction on Clinical Outcomes After Transcatheter Aortic Valve Replacement.

OBJECTIVES: This study sought to determine the impact of left ventricular diastolic dysfunction (LVDD) on clinical outcomes in patients undergoing transcatheter aortic valve replacement (TAVR).

BACKGROUND: Left ventricular (LV) hypertrophy in response to afterload increase promotes the development of LVDD and represents an early stage in the progression to valvular heart failure.

METHODS: In a consecutive cohort of 777 aortic stenosis patients undergoing TAVR, LVDD was categorized according to the latest guidelines. The primary endpoint was 1-year all-cause mortality.

RESULTS: There were 545 (70.1%) patients with LVDD. Ninety-eight (18.0%), 198 (36.3%), and 104 (19.1%) patients were classified as LVDD grades I, II, and III, respectively. In 145 (26.6%) patients, LVDD grade could not be determined because of only 1 or 2 discrepant variables. One-year all-cause mortality was higher in patients with LVDD grades I (16.3%; adjusted hazard ratio [HR]adj : 2.32; 95% confidence interval [CI]: 1.15 to 4.66), II (17.9%; HRadj : 2.58; 95% CI: 1.43 to 4.67), and III (27.6%; HRadj : 4.21; 95% CI: 2.25 to 7.86) than in those with normal diastolic function (6.9%). The difference in clinical outcome emerged within 30 days, was driven by cardiovascular death, and maintained in a sensitivity analysis of patients with normal systolic LV function. Furthermore, LVDD grades I (HRadj : 2.36; 95% CI: 1.17 to 4.74), II (HRadj : 2.58; 95% CI: 1.42 to 4.66), and III (HRadj : 4.41; 95% CI: 2.37 to 8.20) were independent predictors of 1-year mortality.

CONCLUSIONS: Advancing stages of LVDD are associated with an incremental risk of all-cause mortality after TAVR, driven by cardiovascular death and taking effect as early as 30 days after the intervention.