Sex-Specific Differences in Heart Failure: Pathophysiology, Risk Factors, Management, and Outcomes

Area of Science:

• Cardiology
• Clinical Research
• Sex Differences in Medicine

Background:

• Heart failure (HF) is a significant cause of illness and death in Canada.
• Existing research indicates notable sex-specific variations in HF causes, patient characteristics, and responses to treatment.
• These differences impact patient outcomes and necessitate tailored medical approaches.

Purpose of the Study:

• To review and highlight the sex-specific differences in heart failure (HF) presentation and treatment response.
• To identify disparities in healthcare services and knowledge gaps concerning sex-specific HF management.
• To advocate for inclusive research practices that address sex-based variations in HF.

Main Methods:

• Review of existing literature on sex-specific differences in heart failure.
• Analysis of data from heart failure clinical trials, focusing on sex-based outcomes.
• Identification of limitations in current research regarding female participant representation.

Main Results:

• Sex-specific differences exist in HF etiology, epidemiology, comorbidities, and treatment effects.
• Current heart failure trials often under-represent female participants, limiting understanding of sex-specific treatment efficacy and safety.
• Optimal drug dosages and device therapy benefits may vary between sexes, but trials are not powered to detect these differences.

Conclusions:

• Addressing sex-specific differences in heart failure is crucial for improving patient outcomes.
• Randomized controlled trials (RCTs) must enroll participants proportionally to disease distribution to ensure equitable and effective treatments for all sexes.
• Further investigation into sex-specific HF phenotypes and treatment responses is essential to close existing knowledge gaps.