Hypertrophic cardiomyopathy (HCM) thickens the left ventricle in your heart, which can make pumping blood harder and raise the risk of complications if untreated. HCM symptoms can be mild or absent ...

November 24, 2025 • Our annual reading guide returns with 380+ new titles handpicked by NPR staff and trusted critics. Find 13 years of recommendations all in one place — that's more than 4,000 great ...