You searched for: “cardiokymograph
cardiokymograph (s) (noun), cardiokymographs (pl)
A noninvasive device, placed on the chest, which is capable of recording anterior left ventricle segmental wall motion: Cardiokymographs consist of a five-cm diameter capacitive plate transducer as part of a high frequency, low-power oscillator with a recording probe that changes in wall motions that affect the magnetic field and thus the oscillatory frequency which is then recorded on a multichannel analog waveform polygraph.