This dataverse contains the raw data of our recent publication on the mechanics of right ventricular myocardium. Specifically, it contains the force-displacement data of our simple shear experiments on both right and left ventricular myocardium. Additionally, we have included the sample dimensions for each test as well as our histological data. The latter data are images of Mason Trichrome stained longitudinal and radial slices across the same tissue samples as used for the mechanical tests. We added a pdf with a more detailed description to the dataverse. Please address question to manuel.rausch@utexas.edu