Transcatheter Aortic Valve Replacement and Left Ventricular Geometry: Survival and Gender Differences

Area of Science:

• Cardiology
• Cardiac Surgery
• Medical Imaging

Background:

• Transcatheter aortic valve replacement (TAVR) is a key treatment for aortic stenosis.
• Left ventricular (LV) geometry is a crucial determinant of cardiac function.
• Understanding the impact of LV geometry on TAVR outcomes is essential for patient stratification.

Purpose of the Study:

• To investigate the association between baseline left ventricular (LV) geometry and patient outcomes following transcatheter aortic valve replacement (TAVR).
• To determine if specific LV geometry patterns predict survival rates after TAVR.

Main Methods:

• Classified baseline LV geometry in 206 TAVR patients into four types: concentric hypertrophy, eccentric hypertrophy, concentric remodeling, and normal.
• Employed descriptive statistics, Kaplan-Meier survival analysis, and Cox regression to analyze data.
• Examined gender differences in LV geometry distribution at baseline and post-TAVR.

Main Results:

• Baseline LV geometry distribution differed significantly between males and females, but this difference diminished by 1 year post-TAVR.
• Patients with concentric hypertrophy often transitioned to concentric remodeling after TAVR.
• Survival rates at 1 year and 6.5 years post-TAVR varied significantly across different LV geometry groups.
• Concentric hypertrophy was associated with a survival advantage compared to normal geometry and concentric remodeling, which had higher all-cause mortality rates.

Conclusions:

• Baseline concentric hypertrophy is linked to improved survival after TAVR.
• While initial LV geometry patterns may be gender-specific, these distinctions are not sustained long-term post-TAVR.
• LV geometry is an important prognostic factor in patients undergoing TAVR.