The height of the JVP is expressed as the vertical distance from the manubriosternal angle to the maximum height of pulsations in the internal jugular vein with the patient semi-recumbent at an angle of 45 degrees.
It is normally less than 3 cm. This equates to a right atrial pressure of 8 cm of water as in this position, the manubriosternal angle is about 5 cm above the centre of the right atrium.
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