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pre-ejection period

    0.01 sec.
pre-e·jec·tion period (pr-jkshn)
n.
The interval in the electrocardiogram between the onset of the QRS complex and cardiac ejection.

pre-ejection period
the period between when the ventricular contraction occurs and the semilunar valves open and blood ejection into the aorta commences.


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Stroke volume falls and pre-ejection period to left ventricular ejection time ratio rises at 3,100 m because of diminished venous return despite preservation of left ventricular systolic performance.
The same measurements were taken three months later and the results showed that as the ICG measurements of left ventricular ejection time (LVET), pre-ejection period (PEP) and systolic time ratio (STR) improved, so did the measurements of quality of life and NYHA class assessment.
 
 
 
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