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. Author manuscript; available in PMC: 2015 Jul 31.
Published in final edited form as: IEEE Rev Biomed Eng. 2013 Oct 23;7:115–125. doi: 10.1109/RBME.2013.2286296

Figure 1.

Figure 1

Early history of optocardiography stared from work of Marey (A) whose cinematographic gun was used by Mines (B) to record contractions of a frog heart (C). Wiggers used fast film cinematography to analyze different phases of ventricular fibrillation (D).