Cardio Physiology Equations/Definitions - RESIT Flashcards
1
Q
equation for stroke volume
A
SV = EDV - ESV
2
Q
what is EDV?
A
volume of blood in each ventricle at the end of diastole
3
Q
what is SV?
A
the volume of blood ejected by each ventricle per heartbeat?
4
Q
what is CO?
A
the volume of blood pumped by each ventricle per minute
5
Q
equation for CO
A
CO = SV x HR
6
Q
equation for pressure gradient
A
pressure gradient = MAP - central venous pressure
7
Q
what is MAP?
A
the average arterial BP during a single cardiac cycle, which involves contraction and relaxation of the heart
8
Q
3 equations for MAP?
A
- MAP = DBP + 1/3 (SBP - DBP)
- MAP = 2/3 x (DBP + SBP)
- MAP = CO x TPR
9
Q
what is TPR?
A
the sum of the resistance of all peripheral vasculature in the systemic circulation
10
Q
what does increased venomotor tone increase?
A
- venous return
- SV
- MAP
11
Q
what does increase vasomotor tone increase?
A
- TPR
- MAP
