Sex differences in carotid plaque and stenosis

Area of Science:

• Cardiovascular Medicine
• Arterial Remodeling
• Sex Differences in Atherosclerosis

Background:

• Women exhibit greater longevity and some protection against cardiovascular events compared to men.
• Estrogen's potential beneficial effects on endothelial function and atherosclerosis contrast with risks of hormone replacement therapy.
• Significant sex differences in arterial remodeling are suggested by existing evidence.

Purpose of the Study:

• To investigate sex differences in carotid plaque and stenosis.
• To determine the relationship between carotid plaque/stenosis and survival free of stroke, myocardial infarction, and death.

Main Methods:

• Longitudinal study of 1686 patients from an atherosclerosis prevention clinic.
• Annual follow-up for up to 5 years with baseline and follow-up measurements.
• Analysis of carotid plaque area and stenosis in relation to adverse cardiovascular outcomes.

Main Results:

• Carotid stenosis and plaque area increased with age.
• Women presented with greater carotid stenosis (P=0.001) but less plaque area (P<0.0001) than men.
• Plaque area significantly predicted combined stroke, myocardial infarction, and death (P=0.004), while stenosis did not (P=0.042).

Conclusions:

• Sex differences in atherosclerosis exist, with women showing more stenosis and less plaque, potentially due to sex hormones.
• Plaque area is a more potent predictor of adverse cardiovascular outcomes than is the degree of stenosis.
• Understanding these sex-based differences in arterial remodeling is crucial for cardiovascular risk assessment.