Ovine tricuspid annular dynamics and three-dimensional geometry during acute atrial fibrillation.

ABSTRACT:

Objectives

Long-standing atrial fibrillation (AF) may lead to tricuspid regurgitation (TR) and right ventricular dysfunction. However, the effect of acute AF on tricuspid annular (TA) dynamics and three-dimensional geometry is unknown.

Methods

In eight adult sheep, sonomicrometry crystals were implanted around the tricuspid annulus and right ventricular free wall. Pressure transducers were placed in the right ventricle, left ventricle, and right atrium. After weaning from cardiopulmonary bypass and a period of hemodynamic stabilization, simultaneous sonomicrometry and hemodynamic data were collected in sinus rhythm (SR) and during experimental AF (400b/min right atrial pacing). Annular area, perimeter, dimensions, height, global and regional annular contraction, and strain w

SUBMITTER: Kania-Olejnik P 

PROVIDER: S-EPMC11449329 | biostudies-literature | 2024

REPOSITORIES: biostudies-literature