A pocket electrocardiograph carried by patient for observation of various cardiac attacks.
D000787:Angina Pectoris / Q000175:diagnosis*; D001145:Arrhythmias, Cardiac / Q000175:diagnosis; D004562:Electrocardiography / Q000295:instrumentation*; D006331:Heart Diseases / Q000175:diagnosis*; D006801:Humans; D009449:Neurocirculatory Asthenia / Q000175:diagnosis; D014927:Wolff-Parkinson-White Syndrome / Q000175:diagnosis