To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie 2 A video clip shows 2 beating hearts using ex vivo system, which is followed by another video clip that shows the same heart on the right side by echocardiography. A Langendorff-like system to quantify cardiac pump function in adult zebrafish Hong Zhang, Alexey V. Dvornikov, Inken G. Huttner, Xiao Ma, Celine F. Santiago, Diane Fatkin, and Xiaolei Xu Disease Models and Mechanisms 2018. 11:None-None; doi: 10.1242/dmm.034819 Download Original Video