PHONOCATHETER

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References: 9

Phonocardiography with external microphones suffers from interference due to background noise and patient movement. Heart sounds are sometimes detected using a microphone mounted on a catheter, which is passed into the heart as part of the cardiac catheterization procedure. In fact, the miniature catheter-tip pressure transducers used within the chambers of the heart may have sufficient frequency response to collect the heart sounds as well. See also Phonocardiograph, Cardiac microphone and Cardiac catheterization equipment.