To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie 2 Slow motion video of a beating Drosophila heart illustrating “shallow” contractions of a RyR-knocked down heart. Genotype: hand>UAS-RyR-KD. The original video was captured at 207 fps. A new method to characterize function of the Drosophila heart by means of optical flow Hauke Mönck, David Toppe, Eva Michael, Stephan Sigrist, Vincent Richter, Diana Hilpert, Davide Raccuglia, Marina Efetova, and Martin Schwärzel Journal of Experimental Biology 2017. 220:4644-4653; doi: 10.1242/jeb.164343 Download Original Video