Relationship Between Genotype Status and Clinical Outcome in Hypertrophic Cardiomyopathy.

Area of Science:

• Cardiology
• Genetics
• Clinical Medicine

Background:

• Hypertrophic cardiomyopathy (HCM) has a complex genetic basis.
• The link between genotype and clinical outcomes in HCM remains unclear.

Purpose of the Study:

• To investigate the relationship between genetic status and the natural history of hypertrophic cardiomyopathy.
• To determine if genotype positivity influences clinical outcomes in HCM patients.

Main Methods:

• Assessed a large international cohort of 1468 HCM patients.
• Performed genetic testing to classify patients as genotype positive (G+) or genotype negative (G-).
• Followed patients for a median of 7.8 years, examining cumulative event incidence for mortality and adverse events.

Main Results:

• Genotype status (G+ vs. G-) did not significantly differ in all-cause or HCM-related mortality after adjusting for age.
• Adverse event rates, including heart failure progression and sudden death, were not independently associated with genotype status.
• Age was identified as the sole independent predictor for mortality, heart failure progression, and sudden death events in HCM patients.

Conclusions:

• In a large HCM cohort, genotype status (G+ or G-) is not a predictor of clinical course.
• Genotype positivity should not guide clinical management or outcome prediction in hypertrophic cardiomyopathy.
• Age is the primary determinant of clinical outcomes in patients with HCM.