ICD-11 definition : This is an apical, primary disease of the myocardium (the muscle of the heart) in
which a portion of the myocardium is hypertrophied (thickened) without any obvious
cause.;
This is an apical, primary disease of the myocardium (the muscle of the heart) in
which a portion of the myocardium is hypertrophied (thickened) without any obvious
cause.