Learning about Heart Sounds

These tracings are recorded simultaneously from a healthy 15 y.o. male "P.J." at the MCC Paramedic Lab

Chart speed = 25 mm/sec.

ECG Lead I, Gain = 1 mV/cm, Frequency response = 0.05 - 100 Hz

Phonocardiogram at Erbs point, Frequence response = 10 - 200 Hz

Plethsmogram = Non-invasive, right index finger.