cardio key terms Flashcards
1
Q
contractility
A
inherent strength and vigor of heart’s contraction during systole
2
Q
cardiac output (CO)
A
- amount of blood pumped every minute (SVXHR)
3
Q
stroke volume (SV)
A
ml of blood pumped with eacg contraction
4
Q
preload
A
volume of blood in ventricles at the end of diastole, before each contraction
5
Q
afterload
A
peripheral resistance against which the LV must pump
-affected by size of ventricle, wall tension, and BP
6
Q
baroreceptors
A
- in aortic arch and coratid sinus
- sensitive to stretch and pressure of arterial systemt
- vasomotor center in the brain
- increased pressure= decreased HR , decreased pressure (opposite)
7
Q
chemoreceptors
A
- in aortic arch and coratid sinus
- sense CO2 , O2, and pH concentrations in the blood
- decreased O2, increased CO2 , decreased pH= increase HR and vasconstriction
8
Q
BP influenced by…
A
CO and SVR
9
Q
MAP
A
- (SPB + DBP) / 3
- organ perfusion (>60)
10
Q
pulse pressure
A
- SBP-DBP
- increased with exercise
- decreased with low colume and failing heart
11
Q
Arterial Blood Gases ABGs significance
A
- how your body is reacting to oxygen coming in
12
Q
C-reactive protein
A
inlfammation
13
Q
aldosterone regulates …
A
sodium
14
Q
ADH regulates …
A
H2O
15
Q
initial patho for HTN
A
- increase in BP due to increased CO and/or increased SVR
