“…The polarity of the ABC leads, since point X is close to zero potential (Nahum, Mauro, Chernoff, and Sikand, 1951), probably accounts for the fact that the current of injury in the degenerated muscle, as with frank infarction, also produces segment elevation in the tracing. Frey (1938) and Oettel (1941) describe elevation of RST during acute coronary insufficiency without infarction at necropsy.…”