| herz hormone | A substance present in extracts of cardiac tissue that augments cardiac contraction; possibly adenosine, a catecholamine, or some non-specific stimulant present generally in tissues. Synonym: cardiac hormone, heart hormone. (05 Mar 2000) |
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| herzstoss | Cardiac systole characterised by a diffuse precordial heave with or without any definite point of maximal impulse. Origin: Ger. Heart thrust (05 Mar 2000) |