Murine left ventricular papillary muscle can be used to investigate cardiac contractility in vitro. This article describes in detail the isolation and experimental protocols to study cardiac contractile characteristics.
Uhl, S., Freichel, M., Mathar, I. Contractility Measurements on Isolated Papillary Muscles for the Investigation of Cardiac Inotropy in Mice. J. Vis. Exp. (103), e53076, doi:10.3791/53076 (2015).