Absence of the solid part of the right ventricular musculature.
D000787:Angina Pectoris / Q000209:etiology; D001145:Arrhythmias, Cardiac / Q000209:etiology; D001344:Autopsy; D006330:Heart Defects, Congenital; D006352:Heart Ventricles / Q000002:abnormalities*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009206:Myocardium / Q000473:pathology; D013614:Tachycardia, Paroxysmal / Q000209:etiology