About Hypertrophic Cardiomyopathy (HCM)

HCM is a progressive, chronic disease that can lead to complications like heart failure, atrial fibrillation (AFib), stroke, and rarely, sudden cardiac death.

An illustration of a healthy heart, pointing out the healthy walls of the heart

An illustration of a heart with non-obstructive hypertrophic cardiomyopathy (HCM), pointing out the thickened heart wall

An illustration of a heart with obstructive hypertrophic cardiomyopathy (HCM), pointing out the thickened heart wall and reduced blood flow

Two types of HCM are non-obstructive HCM and obstructive HCM, with obstructive being the most common. Both cause the heart muscle wall to thicken and stiffen, making it harder for the heart to fill with blood.

In obstructive HCM, the heart muscle becomes so thick that it blocks or reduces blood flow from the heart to the rest of the body.

Some people also experience symptoms with obstructive HCM, which is called symptomatic obstructive HCM. These symptoms can worsen over time, even when you are taking medicine to help manage symptoms.

Common Symptoms of HCM

Symptoms that affect your daily activities can be a marker of how severe your HCM is and if it’s getting worse. New or worsening symptoms could mean your HCM is progressing even if you’re taking medicine.