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Effect of cardiac resynchronization therapy on left atrial appendage function and pulmonary venous flow pattern
Ahmet Vural1, Aysen Agacdiken, Dilek Ural
1Department of Cardiology, Kocaeli University Medical Faculty, 41900 Derince, Kocaeli, Turkey. drahmetvural@superonline.com
International Journal of Cardiology
|June 9, 2005
Summary
Cardiac resynchronization therapy (CRT) significantly improves left atrial appendage (LAA) function and pulmonary venous flow in heart failure patients. This therapy enhances LAA ejection fraction and systolic velocities, contributing to overall cardiac improvement.
Area of Science:
- Cardiology
- Cardiac Electrophysiology
- Heart Failure Management
Background:
- Cardiac resynchronization therapy (CRT) is known to improve left ventricular function and reverse remodeling.
- Previous research indicates positive effects of CRT on the left ventricle and left atrium.
Purpose of the Study:
- To investigate the impact of CRT on left atrial appendage (LAA) function.
- To assess changes in pulmonary venous flow patterns following CRT.
Main Methods:
- Biventricular pacemakers were implanted in 18 patients with systolic heart failure and left bundle branch block.
- Transthoracic and transesophageal echocardiography were used to evaluate LAA function before and 1, 6 months after CRT.
Main Results:
- CRT led to significant clinical improvement and reduced NYHA class in 94% of patients.
- LAA dimensions decreased, while LAA ejection fraction increased significantly post-CRT.
- Active LAA emptying/filling flow and pulmonary venous systolic velocities showed marked increases after CRT.
Conclusions:
- Cardiac resynchronization therapy significantly enhances left atrial appendage function.
- CRT treatment leads to increased pulmonary venous systolic velocity in heart failure patients.