: increasing or decreasing the force of muscular contractions
… the long-term effect of this type of positive inotropic agent on the survival of patients with chronic heart failure has not been determined.Milton Packer et al.

Word History

Etymology

International Scientific Vocabulary ino- (from Greek in-, is sinew) + -tropic

First Known Use

1903, in the meaning defined above

Time Traveler
The first known use of inotropic was in 1903

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Cite this Entry

“Inotropic.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/inotropic. Accessed 8 Jul. 2026.

Medical Definition

: influencing muscular contractility : increasing or decreasing the force of muscular contractions
digitalis is a positive inotropic agent
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