stroke volume variability
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stroke volume variabilityAbbreviation: SVV
The change in the amount of blood ejected from the left ventricle into the aorta with each heartbeat. Stroke volume variability measurements may be used to assess the autonomic responsiveness or preload of critically ill patients during positive pressure ventilation. If SVV is > 15% during a positive pressure breath the patient is volume depleted.
See also: variability