phonocardiography

phonocardiography /pho·no·car·di·og·ra·phy/ (fo″no-kahr″de-og´rah-fe) the graphic representation of heart sounds or murmurs; by extension, the term also includes pulse tracings (carotid, apex, and jugular pulses).phonocardiograph´ic

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phonocardiography

[-kär′dē·og′rəfē]

Etymology: Gk, phone + kardia + graphein, to record

the recording of heart sounds and murmurs by a phonocardiograph.

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phonocardiography

the graphic recording of heart sounds and murmurs; by extension, the term includes pulse tracings (carotid, apex and venous pulse).

Phonocardiography involves picking up, through a highly sensitive microphone, sonic vibrations from the heart which are then converted into electrical energy and fed into a galvanometer, where they are recorded on paper. The procedure is most useful when there is evidence of heart murmurs or unusual heart sounds, such as gallops, that are difficult to discern by the human ear. Most recordings are made through an externally applied microphone but intracardiac recordings, made through a phonocatheter, are possible.

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phonocardiography

Echophonocardiography Cardiology A non-invasive technique that amplifies faint, low frequency sounds of blood flowing through the heart and great vessels, displaying them graphically; PCG encompasses carotid, apex, and venous pulse tracings Applications Diagnose heart valve defects, ventricular hypertrophy, left heart failure; PCG is usually performed in synchrony with EKG, and M-mode echocadiography or Doppler echocardiography, to match changes heard by PCG with the point at which they occur in the heart beat