Endothelial function and soluble endoglin in smokers with heart failure

Area of Science:

• Cardiovascular Medicine
• Vascular Biology
• Clinical Research

Background:

• Cigarette smoking is a known risk factor for heart failure (HF).
• Smokers with HF paradoxically exhibit lower mortality rates during and after hospitalization compared to nonsmokers.
• The underlying mechanisms for this

Purpose of the Study:

• To investigate vascular endothelial function in chronic smokers versus nonsmokers with HF.
• To determine if smokers with HF exhibit attenuated endothelial dysfunction compared to nonsmokers with HF.
• To explore the role of soluble endoglin (sEng) in the observed differences.

Main Methods:

• Brachial artery flow-mediated dilation (FMD) was measured in 33 patients with HF (smokers and nonsmokers) and controls.
• Soluble endoglin (sEng) levels were measured in 36 patients with HF (smokers and nonsmokers) and controls.
• Comparison of FMD and sEng between smoking and nonsmoking groups with and without HF.

Main Results:

• FMD was lower in smokers without HF compared to nonsmokers without HF.
• FMD was significantly higher in smokers with HF compared to nonsmokers with HF, similar to nonsmokers without HF.
• sEng was lower in smokers with HF compared to nonsmokers with HF, similar to nonsmokers without HF.

Conclusions:

• Smokers with HF demonstrate preserved vascular endothelial function (higher FMD, lower sEng) compared to nonsmokers with HF.
• These findings suggest that improved vascular endothelial function may contribute to the observed