There are two variants of<unk>  cardiomyopathy: an obstructive variant, and a non-obstructive variant. About 25% of individuals with<unk>  cardiomyopathy (HCM) demonstrate an obstruction to the outflow of blood from the left ventricle during rest. In other individuals, obstruction only occurs under certain conditions. This is known as dynamic outflow obstruction because the degree of obstruction is variable and is dependent on the amount of blood in the ventricle immediately before ventricle systole (contraction). If left ventricular outflow obstruction is present, then this syndrome has been known as wide variety of terms including:<unk>  cardiomyopathy or HCM, asymmetric septal hypertrophy or ASH,<unk>  obstructive cardiomyopathy, HOCM, idiopathic<unk>  subaortic stenosis or IHSS.
A non-obstructive variant of HCM is known as apical<unk>  cardiomyopathy , which is also known as nonobstructive<unk>  cardiomyopathy and Japanese variant<unk>  cardiomyopathy or the Yamaguchi variant (since the first cases described were all in individuals of Japanese descent), also known as apical<unk>  cardiomyopathy (ApHCM) or Yamaguchi syndrome.
Hypertrophic cardiomyopathy classification
Left ventricular aneurysm classification
Stress cardiomyopathy classification
European society of cardiology guidelines classification scheme
Dilated cardiomyopathy classification
Long QT Syndrome classification
Aortic stenosis classification
Cardiomyopathy classification