• idiopathic
  • The main differential diagnoses are idiopathic right ventricular outflow tract tachycardia, myocarditis, dialted cardiomyopathy and sarcoidosis. (biomedcentral.com)
  • Only 10 years have elapsed since the concept of functional obstruction to left ventricular ejection was introduced to clinical medicine (1), and in the interim the features of obstructive cardiomyopathy, or idiopathic hypertrophic subaortic stenosis, have become generally recognized. (annals.org)