Recording of the moment-to-moment electromotive forces of theÂ HEARTÂ as projected onto various sites on the body's surface, delineated as a scalar function of time. The recording is monitored by a tracing on slow moving chart paper or by observing it on a cardioscope, which is aÂ CATHODE RAY TUBE DISPLAY. The trait is Experimental Factor Ontology id EFO_0004327 (electrocardiography). Also known as: EKG, electrocardiogram.