[Photoelectric elongation meter to register thoracic cardiograms and pulse waves].
D002309:Cardiology / Q000295:instrumentation*; D002320:Cardiovascular Physiological Phenomena; D006339:Heart Rate; D006801:Humans
CARDIOLOGY/apparatus and instruments
Photo-elektrische Elongationsmesser zur Registrierung von Thorax-Kardiogramm und Pulswellen.