cardiac hormone

herz hor·mone

a substance present in extracts of cardiac tissue that augments cardiac contraction; possibly adenosine, a catecholamine, or some nonspecific stimulant present generally in tissues. Synonym(s): cardiac hormone, heart hormone

cardiac hormone

An obsolete term for any substance—e.g., adenosine, catecholamines or others—derived from cardiac tissue extracts which augments cardiac contractility.