PHONOCARDIOGRAM – Purpose, Findings, Interfering Factors, Client Preparation, Procedure and After Care
- A phonocardiogram is a graphical recording of cardiac sounds. It is a noninvasive test that amplifies cardiac sounds, which are recorded simultaneously with the electrocardiograph reading
- Phonocardiography is the graphic recording of heart sounds and pulse waves and their relation to time. It helps to identify, accurately time and differentiate various sounds and murmurs. It provides a permanent record for future comparison
PURPOSE
The phonocardiogram if performed to determine the exact timing of heart sounds, differentiate the varied sounds such as murmurs, splits and clicks and evaluate valvular function
FINDINGS
- Valve disorders (stenosis or incompetence)
- Estimate of ventricular function
- Hypertrophic cardiomyopathies
INTERFERING FACTORS
- Improper placement
- Muscle tremors
- Obesity
- Valsalva maneuver
CLIENT PREPARATION
- Inform the client as to the purpose and procedure of the study
- Explain to the client that the test is painless and that no risk is involved
- Instruct the client to remain quiet and still during the procedure
PROCEDURE
- Electrocardiograph electrodes are applied and attached to the electrocardiogram recorder
- Conduction jelly is applied to the chest wall
- As the phonogram microphone is positioned at various sites over the chest wall, the client may be asked to change position, perform muscle tightening or change breathing patterns
- Phonocardiogram may be carried out at the bedside, in the physician’s office, inside the clinic or in a cardiac laboratory
AFTER CARE
- Remove conduction jelly from the chest and extremities
- Record the entire procedure in the nurse’s record
