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Published on: August 9, 2024
What we know and do not know about sex and cardiac disease
1Department of Physiology, Molecular Cardiovascular Research Program, Sarver Heart Center, University of Arizona, 1656 E Mabel, Medical Research Building, Room 320, Tucson, AZ 85724, USA. konhilas@arizona.edu
Insights
Sex differences in congestive heart failure (CHF) are significant. Understanding these disparities in cardiovascular disease (CVD) requires examining sex-specific cellular mechanisms for better outcomes.
Area of Science:
- Cardiology
- Sex Differences in Medicine
- Molecular Biology
Background:
- Cardiovascular disease (CVD) is the leading cause of death globally.
- Congestive heart failure (CHF) is a common outcome for CVD patients.
- Sex differences in CHF etiology, development, and outcomes are increasingly recognized.
Purpose of the Study:
- To highlight key aspects of sex differences in CVD and CHF.
- To emphasize unanswered questions regarding these sex dimorphisms.
- To advocate for sex-specific cellular mechanism analysis in CHF research.
Main Methods:
- Review of existing literature on sex differences in cardiac disease.
- Analysis of inconsistencies in current research findings.
- Focus on the complex interplay of genetic and non-genetic factors in CHF development.
Main Results:
- Women with CHF are often older and present with preserved systolic function compared to men.
- Significant inconsistencies exist in the literature regarding underlying mechanisms of sex dimorphisms.
- The precise molecular mechanisms driving sex differences in CHF remain unclear.
Conclusions:
- Understanding sex dimorphisms in CHF is critical for effective treatment.
- Cellular mechanisms must be analyzed within the context of each sex.
- Further research is needed to resolve inconsistencies and clarify molecular pathways.
Abstract:
Cardiovascular disease (CVD) remains the single leading cause of death in both men and women. A large proportion of the population with CVD will die with a diagnosis of congestive heart failure (CHF). It is becoming increasingly recognized that sex differences exist in the etiology, development, and outcome of CHF. For example, compared to male counterparts, women that present with CHF are typically older and have systolic cardiac function that is not impaired. Despite a growing body of literature addressing the underlying mechanisms of sex dimorphisms in cardiac disease, there remain significant inconsistencies reported in these studies. Given that the development of CHF results from the complex integration of genetic and nongenetic cues, it is not surprising that the elucidation and subsequent identification of molecular mechanisms remains unclear. In this review, key aspects of sex differences in CVD and CHF will be highlighted with an emphasis on some of the unanswered questions regarding these differences. The contention is presented that it becomes critical to reference cellular mechanisms within the context of each sex to better understand these sex dimorphisms.
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