Exposure to electronic cigarettes impairs vascular and microvascular function

Area of Science:

• Cardiovascular Physiology
• Vascular Biology
• Smoking Cessation Research

Background:

• E-cigarette use is rising, often perceived as safer than traditional smoking.
• Conflicting evidence exists regarding e-cigarettes' impact on vascular health.
• This study investigates differences in vascular/microvascular function between e-cigarette and tobacco smokers.

Purpose of the Study:

• To compare markers of vascular and microvascular function between e-cigarette users, tobacco smokers, and never-smokers.
• To assess the acute effects of e-cigarette and tobacco use on these markers.
• To elucidate the specific impact of e-cigarettes on vascular health compared to traditional smoking.

Main Methods:

• 108 participants: 39 e-cigarette users, 39 tobacco smokers, 30 never-smokers.
• Measurements included coronary flow reserve (CFR), flow-mediated dilatation (FMD), and pulse wave velocity (PWV).
• Vascular function was assessed before and after acute exposure to smoking or e-cigarette use.

Main Results:

• Baseline CFR was lower in both user groups compared to controls.
• Acute e-cigarette exposure significantly decreased CFR and increased PWV.
• Acute tobacco smoking significantly decreased CFR and FMD.

Conclusions:

• Both e-cigarette and tobacco users exhibit baseline coronary microvascular dysfunction.
• Acute exposure to either e-cigarettes or tobacco exacerbates vascular and microvascular dysfunction.
• Findings suggest e-cigarettes may pose similar risks to vascular health as traditional smoking.