RT Book, Section
A1 Evans, Nicholas
A2 Kline, Mark W.
SR Print(0)
ID 1182921383
T1 Neonatal Hemodynamics
T2 Rudolph's Pediatrics, 23e
YR 2018
FD 2018
PB McGraw-Hill Education
PP New York, NY
SN 9781259588594
LK accesspediatrics.mhmedical.com/content.aspx?aid=1182921383
RD 2024/04/23
AB Hemodynamics,  or  the  movement  of  blood,  is  necessary  to  delivery  oxygen  to  the  tissues  of  the  body.  Oxygen  delivery  is  determined  by  several  factors,  and  failure  of  any  these  can  lead  to  organ  injury  and/or  death.  Oxygen  delivery  is  determined  by  (1)  the  oxygen  level  and  carrying  capacity  of  the  blood,  both  of  which  are  easy  to  measure  and  monitor  and  (2)  the  flow  rate  of  blood  around  the  systemic  and  pulmonary  circulations.  Both  the  circulations  are  driven  by  the  heart,  and  the  flow  is  measured  by  the  output  of  each  of  the  ventricles.  In  a  mature  circulation,  the  right  ventricular  output  (RVO)  drives  the  pulmonary  blood  flow  and  the  left  ventricular  output  (LVO)  drives  the  systemic  blood  flow.  The  efficiency  with  which  each  ventricle  does  this  is  determined  by  the  volume  of  blood  entering  the  ventricle  (the  preload),  the  health  (or  maturity)  of  the  myocardium  (contractility),  and  the  resistance  against  which  the  ventricle  is  pumping  (afterload).