inotropic

(ē'nə-trō'pĭk, -trŏp'ĭk, ī'nə-)
adj.
Affecting the contraction of muscle, especially heart muscle: an inotropic drug.

[Greek īs, īn-, tendon, sinew + -TROPIC.]

(ĭn'ə-trŏp'ĭk, -trō'pĭk, ī'nə-, ē'nə-)
adj.

Affecting the contraction of muscle, especially heart muscle.

Affecting the force of muscular contractions; commonly applied to drugs that increase contractility of cardiac muscle, e.g. digitalis glycosides.