[Technical error in a EKG recording because of instrument malfunction].
Er
F
F
Klinik III für Innere Medizin, Universität zu Köln, Köln, Germany.
Hoppe
U C
UC
D000369:Aged, 80 and over; D004562:Electrocardiography / Q000295:instrumentation*; D004868:Equipment Failure; D005260:Female; D006801:Humans