A new study shows that microinjection of RNA molecules into mouse embryos induces a hereditary form of cardiac hypertrophy that is similar to human hypertrophic cardiomyopathy (HCM).

High-risk patients with hypertrophic cardiomyopathy appear to have reduced risk of sudden cardiac death with an implantable cardioverter-defibrillator that terminates dangerous heart rhythm disorders, according to a study in the July 25 issue of JAMA.