MYH7 and atrial fibrillation: Supporting this finding, it has been demonstrated that HCM patients with sarcomeric mutations, specifically in MYH7 and MYBPC3, exhibit a higher prevalence of low-voltage areas in the LA on electroanatomical mapping, indicative of LA scarring that may contribute to the AF burden, compared to genotype-negative HCM patients (6.1% vs. 2.3%; p < 0.001) (89).