HOCM

Medical abbreviation · Cardiology

HOCM
Stands forHypertrophic obstructive cardiomyopathy
CategoriesMedical

HOCM stands for Hypertrophic obstructive cardiomyopathy, a cardiology abbreviation.

Form of hypertrophic cardiomyopathy in which the thickened septum and forward motion of the mitral valve block blood leaving the left ventricle. Obstruction means an outflow gradient of 30 mmHg or more at rest or with provocation; 50 mmHg or more is the usual threshold for invasive treatment.

Example: HOCM with gradient rising to 90 mmHg on Valsalva; referred for septal myectomy.

Usage notes

Pronounced "HOE-kum." The murmur grows louder with Valsalva and standing, which reduce preload, and softer with squatting or handgrip, a classic bedside distinction from aortic stenosis. Dehydration, vasodilators and nitrates can worsen obstruction. An older name was IHSS, idiopathic hypertrophic subaortic stenosis.

More cardiology abbreviations

  • HFmrEF – Heart failure with mildly reduced ejection fraction
  • HFpEF – Heart failure with preserved ejection fraction
  • HFrEF – Heart failure with reduced ejection fraction
  • HHD – Hypertensive heart disease
  • HLD – Hyperlipidemia
  • HLHS – Hypoplastic left heart syndrome
  • HRS – Heart Rhythm Society
  • hs-cTn – High-sensitivity cardiac troponin
  • HTN – Hypertension
  • IABP – Intra-aortic balloon pump
  • ICD – Implantable cardioverter-defibrillator
  • ICM – Ischemic cardiomyopathy

See all 229 cardiology abbreviations →

Edited by the AbbreviationList.com team. Spotted an error or a missing meaning? Contact us.

This entry is for general education and is not medical advice. Abbreviation use varies between institutions; always confirm in context.