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[Does cardiac resynchronization therapy improve nitric oxide concentration in exhaled gas?]
Tomoya Hiratsuji1, Hitoshi Adachi, Naoki Isobe
1Division of Cardiology, Gunma Prefectural Cardiovascular Center, Kameizumi Ko 3-12, Maebashi, Gunma 371-0004.
Journal of Cardiology
|January 31, 2004
Summary
Cardiac resynchronization therapy (CRT) improved cardiac function and enhanced nitric oxide (NO) production in patients with chronic heart failure. This suggests CRT can improve vascular endothelial cell function in these individuals.
Area of Science:
- Cardiology
- Pulmonary Medicine
- Vascular Biology
Context:
- Chronic heart failure (CHF) significantly impairs cardiac function and can affect endothelial health.
- Intraventricular conduction delay is a common complication in CHF, impacting cardiac performance.
- The role of cardiac resynchronization therapy (CRT) in improving vascular endothelial function in CHF patients remains unclear.
Purpose:
- To investigate the effect of CRT on vascular endothelial cell function in patients with chronic heart failure.
- To assess changes in nitric oxide (NO) output, a marker of endothelial function, following CRT.
- To determine if CRT influences respiratory parameters in CHF patients.
Summary:
- Six patients with chronic heart failure and dilated cardiomyopathy underwent CRT.
- End-tidal nitric oxide (NO) concentration was measured before and after CRT.
- Left ventricular ejection fraction improved post-CRT, and end-tidal NO significantly increased, while respiratory parameters remained unchanged.
Impact:
- CRT improves vascular endothelial cell function in patients with dilated cardiomyopathy and chronic heart failure.
- Increased end-tidal NO suggests enhanced vascular shear stress due to improved pulmonary perfusion post-CRT.
- CRT offers a potential therapeutic benefit for endothelial dysfunction in heart failure patients.