Can you describe hypertrophic obstructive cardiomyopathy?

Thick heart muscle: Hypertrophic obstructive cardiomyopathy is an abnormal thickening of the heart muscle, particularly of the ventricles. Often the septum, the wall between the ventricles, is much thicker than the other walls. When the heart contracts, this abnormally thick septum creates a narrow area that can block, or "obstruct", the flow of blood out of the left ventricle.

Thickened heart: Hypertrophic obstructive cardiomyopathy (hocm) is a genetic condition that causes excessive thickening of the myocardium (heart muscle) as a result of abnormalities with the genes that control heart muscle cell growth. Often one part of the heart is thicker than other parts. Heart muscle thickening may make if more difficult for the heart to relax and fill, and harder for blood to leave the heart.