Lecture 6:Hemodynamics, Pressure, Flow, Resistance Flashcards
1
Q
hemodynamics
A
study of fluid flow in vascular system
2
Q
Resistance
A
to fluid flow caused by friction between molecs in fluid and walls of tube
3
Q
Frictional resistance
A
always reduces flow
4
Q
Cross sectional Area and Vascular
A
Arota:
3cm2 40 cm/sec
vena cava 14 cm2 (7 each) 5-20 cm/sec
caps: 5000cm2: 0.1 cm/sec
5
Q
equal bp?
A
NO. there would be no flow
6
Q
pressure difference
A
driving pressure
7
Q
pulsatile
A
pressure goes up when blood goes into aorta
pressure dec when heart resting
8
Q
Bp is
A
in phase with heartbeat
9
Q
BP peak and fall
A
peak: systole
falls: diastole
10
Q
MAP =
A
DBP + 1/3 (SBP-DBP)
11
Q
MAP
A
mean arterial pressure
12
Q
SBP
A
systolic
13
Q
DBP
A
diastolic
14
Q
facrots of arteries close to heart
A
elasticity
amount of blood forced into arteries
15
Q
C (constant)
A
= change in V over change in pressure
