University Hospital Giessen 1 article published in JoVE Biology Simultaneous Isolation of High Quality Cardiomyocytes, Endothelial Cells, and Fibroblasts from an Adult Rat Heart Dursun Gündüz1, Christian W. Hamm1, Muhammad Aslam1 1Internal Medicine, Cardiology and Angiology, University Hospital Giessen Several protocols have been developed and described for the isolation of different cardiac cell types from a rat heart. Here, an optimized protocol is described that allows the isolation of high-quality major cardiac cell types (cardiomyocytes, endothelial cells, and fibroblasts) from a single preparation, reducing the experimental costs.