After atrial contraction is complete, the atrial pressure begins to fall causing a pressure gradient reversal across the AV valves. This causes the valves to float upward (pre-position) before closure. At this time, the ventricular volumes are maximal, which is termed the end-diastolic volume (EDV).
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Service Representative-Kingston, NY (1st shift). Must have a Valid Driverâs License and be at least 21 years old. Youâll track, handle and process specimen samples â treating them as if they were your own... 1 day ago-save job-email-more... 1  View all LabCorp jobs in Kingston, NY-Kingston jobs.