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Sex differences in response to treatments for chronic coronary artery disease
Molly Szerlip1, Cindy L Grines
1Department of Cardiovascular Medicine, William Beaumont Hospital, Royal Oak, MI, USA.
Insights
Coronary artery disease (CAD) affects more women, often presenting atypically with microvascular issues. Sex-specific physiological differences impact treatment effectiveness and procedural uptake in women.
Area of Science:
- Cardiology
- Cardiovascular Medicine
- Medical Science
Background:
- Coronary artery disease (CAD) mortality is higher in women.
- Women's cardiovascular disease presentation can be atypical, involving small vessel disease and endothelial dysfunction more than obstructive epicardial coronary artery disease.
- Sex-specific physiological, pharmacokinetic, and pharmacodynamic differences influence disease presentation and treatment response.
Purpose of the Study:
- To highlight the sex differences in coronary artery disease (CAD) presentation, pathophysiology, and treatment response.
- To underscore the unique physiological characteristics of women's cardiovascular systems.
- To examine disparities in the utilization of diagnostic and interventional procedures for CAD in women.
Main Methods:
- Review of existing literature comparing cardiovascular disease in men and women.
- Analysis of physiological differences (heart size, heart rate, cardiac cycle length, QT interval) between sexes.
- Examination of treatment response data and procedural statistics stratified by sex.
Main Results:
- Women exhibit diffuse CAD, endothelial dysfunction, and microvascular disease more frequently than men.
- Physiological differences, including smaller heart size and altered cardiac cycle dynamics, exist between sexes.
- Women undergo fewer percutaneous coronary interventions and diagnostic angiographies, with potential treatment delays.
Conclusions:
- Sex-based differences in CAD presentation and pathophysiology necessitate tailored clinical approaches.
- Understanding sex-specific physiology is crucial for optimizing medical and interventional treatment strategies in women.
- Addressing disparities in diagnostic and treatment access is essential to improve outcomes for women with CAD.
Abstract:
More women than men die of coronary artery disease (CAD) each year. In women, cardiovascular disease can present atypically and may be caused by small vessel disease rather than by major epicardial coronary luminal narrowing. Women with CAD tend to have more diffuse disease, endothelial dysfunction, and microvascular disease than men. In those studies that have looked at sex differences in treatment response, sex-specific physiologic, pharmacokinetic, and pharmacodynamic differences appear to be the cause. Women have smaller hearts, higher heart rates, shorter cardiac cycle lengths, and longer QT intervals than men. CAD medical treatments such as antiplatelet agents, anticoagulants, beta-blockers, and antithrombin agents may have different effects in women and men. Only 30% of percutaneous coronary interventions are performed in women. Women are less likely than men to undergo diagnostic angiography and are more likely to experience delays in treatment.
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