Key result
Levosimendan (≤0.03 microM) induced positive inotropy in guinea-pig hearts that was not antagonized by PKA or PKG inhibitors, indicating effects are due to calcium sensitization.
Population
Guinea-pig heart preparations (Langendorff, papillary muscle, skinned fibers)
Comparison
Levosimendan with or without PKA inhibitor, PKG… vs Milrinone with or without the same…
Design
Preclinical
Authors
Loading...
No immediate change to clinical levosimendan use; leaves open human translation of calcium sensitization.
Levosimendan's positive inotropic effects at therapeutic concentrations are not mediated by PKA or PKG, supporting troponin-C-mediated calcium sensitization as its primary mechanism.
H Haikala (1997) studied this question. Levosimendan vs. Milrinone was evaluated on Left ventricular systolic peak pressure. Levosimendan (≤0.03 microM) induced positive inotropy in guinea-pig hearts that was not antagonized by PKA or PKG inhibitors, indicating effects are due to calcium sensitization.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: