By Medically reviewed by Helen Chen MCMSc, PA-C — Written By Kristeen Cherney
Hypertrophic cardiomyopathy (HCM) causes thickening of the heart muscle, particularly in the left ventricle in the lower part of the heart. This can lead to symptoms such as heart murmurs, swelling, fatigue, and chest pain.
Cardiomyopathy is an umbrella term used to describe difficulties with your heart being able to pump blood. There are different subtypes of this condition, including hypertrophic cardiomyopathy (HCM).
It’s important to talk with a doctor if you’re experiencing possible symptoms of HCM. While most people can lead everyday lives with this condition, there’s also a risk of developing heart-related complications if HCM is left untreated.
Below are 12 signs and symptoms of HCM you may consider discussing further with your doctor.
Symptoms of hypertrophic cardiomyopathy
Some people in the early stages of HCM may not have symptoms. However, symptoms of HCM may develop as the condition worsens or may be mild in earlier stages.
Possible symptoms of HCMTrusted Source include:
Dizziness: Reduced blood flow or irregular heart rate from HCM may cause you to feel dizzy. This can also worsen when you stand up suddenly after resting.
Fainting: In some cases, dizziness from HCM can also cause you to feel faint.
Fatigue: HCM can make you feel more tired than usual, even after getting a good night’s sleep or taking a rest.
Shortness of breath: This symptom can also worsen after physical activity.
Chest pain: Blood flow and heart rate irregularities can make you feel pain in your chest. Pain may also be worse after you eat a large meal or exercise.
Edema: While also a possible sign of HCM that a doctor may detect, you may also notice swelling in your stomach or extremities as an HCM symptom.
Gastrointestinal problems: Symptoms such as diarrhea, vomiting, and loss of appetite may occur, especially in babies and young children.

