A method of diagnosing the heart condition of a living body moving in the water, in which an electrocardiogram recorded by the steps of hermetically contacting electrodes on the skin surface of the body moving under water, detecting an electrocardiac signal by the electrodes, leading the detected electrocardiac...http://www.google.ca/patents/US4791933?utm_source=gb-gplus-sharePatent US4791933 - Radio electrocardiography for a living body moving in the water
