ECG artifact and defibrillator/monitors.
D004554:Electric Countershock / Q000295:instrumentation* / Q000592:standards; D004560:Electricity; D004562:Electrocardiography / Q000295:instrumentation* / Q000592:standards; D004868:Equipment Failure; D006801:Humans; D008991:Monitoring, Physiologic / Q000295:instrumentation* / Q000592:standards