What are the inherited heart diseases?
The most common among the inherited heart diseases is a particular disease of the heart muscle known as hypertrophic cardiomyopathy – HCM. In hypertrophic cardiomyopathy heart muscle gets progressively thickened so that in some cases it obstructs the flow of blood from the left ventricle into the aorta (hypertrophic obstructive cardiomyopathy – HOCM). But in most cases there is no obstruction to the blood flow and it is called hypertrophic non obstructive cardiomyopathy (HNOCM). Some forms of heart muscle coming under the group of familial dilated cardiomyopathy are also inherited. In these cases, the heart muscle becomes weak and heart progressively enlarges and fails.
Another group of inherited disorders of the heart are inherited electrical disorders of the heart (cardiac ion channel disorders or cardiac channelopathies). This broad group has several disorders like long QT syndromes, short QT syndromes, Brugada syndrome and arrhythmogenic cardiomyopathy.