positive inotropic activity

Vesnarinone (Arkin) 是一种喹啉酮衍生物，可抑制磷酸二酯酶III 活性，增加钙通量和减小钾通量。

Imazodan 是一种具有正性肌力活性的小分子化合物，是选择性III型磷酸二酯酶抑制剂，可用于研究心力衰竭。

Amrinone (Inocor) 是一种正性肌力血管扩张剂，是一种具有口服活性的，非糖苷和非儿茶酚胺的强心剂，也是一种选择性磷酸二酯酶 III (phosphodiesterase III) 抑制剂，能够防止环磷酸腺苷分解，从而增加环磷酸腺苷水平。

Milrinone Lactate is a positive inotropic cardiotonic compound. Milrinone Lactate has vasodilator properties, inhibiting cAMP phosphodiesterase type 3 activity in the myocardium and vascular smooth muscle.

MK-761 TFA 是一种高效且可口服的 β2-肾上腺素 (β2-adrenergic) 受体阻滞剂，具有抗高血压和正性肌力效应，并表现出血管扩张活性。

LY 249933 is a cardioselective 1, 4-dihydropyridine with positive inotropic activity.

Olprinone (Loprinone) Hydrochloride 是一种有效的磷酸二酯酶(PDE) 3抑制剂，对 PDE1，PDE2，PDE3，PDE4 的IC50分别为 150、100、0.35 和 14 μM。Olprinone Hydrochloride 由于具有正性肌力和血管扩张作用而被用于心力衰竭的研究。Olprinone Hydrochloride 具有抗炎活性。

Enoximone sulfoxide is a selective phosphodiesterase III (PDE3) inhibitor with vasodilating and positive inotropic activity that does not cause changes in myocardial oxygen consumption. Enoximone prevents the degradation of cAMP by PDE, which prolongs signal transduction and its subsequent effects. It is used in patients with congestive heart failure.

Inamrinone lactate is a positive inotropic cardiotonic with vasodilator properties, phosphodiesterase inhibitory activity, and the ability to stimulate calcium ion influx into the cardiac cell.

Doxaminol is a synthetic partial beta-adrenergic agonist with sympathomimetic activity. Doxaminol may bind to and stimulate beta-1-adrenergic receptors located in the myocardium. As a result, it leads to a positive inotropic effect and increases in cardiac output.