• Hypertrophic cardiomyopathy In this condition, there is abnormal growth or thickening of your heart muscle, particularly affecting the muscle of your heart’s main pumping chamber. This cause the heart tends to stiffen and the size of the pumping chamber may shrink, interfering with your heart’s ability to deliver blood to your body. This condition becomes very severe if it becomes apparent during childhood. There is a strong family history of the disease, and some genetic alterations have been linked to this disease.
  • Restrictive cardiomyopathy – In this condition, the heart muscle becomes rigid and less elastic. This means the heart can’t properly expand and fill with blood between heartbeats. It is a disease of old age mostly. It is a rarest of all three types of cardiomyopathies. It can occur for no known reason (idiopathic). It is also associated with diseases elsewhere in the body that affects the heart.