Lecture 18: Arterial System and Pulse Pressure (Hayward) Flashcards Preview

Undeleted > Lecture 18: Arterial System and Pulse Pressure (Hayward) > Flashcards

Flashcards in Lecture 18: Arterial System and Pulse Pressure (Hayward) Deck (28)
Loading flashcards...
1
Q

BP usually measures:

A

arterial pressure

2
Q

arterial or venous side has more resistance?

A

arterial side

3
Q

Pressure in arterial system is a fx of:

A

volume in minus volume out

4
Q

Dicrotic notch

A

assoc. with sudden release of push from heart; there is initial fast recoil that is very fast, which means there will be a squeeze of blood on arterial system that is greater than what’s leaving at that time

5
Q

What physiological factors determine arterial pressure?

A

cardiac output, vascular resistance

6
Q

What physical factors determine arterial pressure?

A

blood volume, vessel compliance. We have less control over these

7
Q

increased vessel compliance –> change in pressure for same volume in?

A

decreased

8
Q

increased cardiac output –> MAP at constant TPR?

A

increases

9
Q

Increased TPR with constant cardiac output –> MAP?

A

Increases

10
Q

Total energy =

A

= KE + PE = systolic energy

11
Q

What type of energy is used to move blood forward during diastole?

A

PE

12
Q

outflow&raquo_space;>inflow in ________

A

diastole

13
Q

inflow > outflow in _______

A

systole

14
Q

changes in CO force changes in _____ if TPR remains the same

A

MAP

15
Q

pulse pressure =

A

systolic pressure - diastolic pressure

16
Q

MAP formulas

A

MAP = CO * TPR = (HR*SV) * TPR = Pdia + [(Psys - Pdia)/3]

17
Q

systolic pressure

A

peak pressure generated when heart pumps blood out to arterial system

18
Q

Main factors contributing to systolic pressure (3)

A

1) ventricular stroke volume
2) rate of ejection
3) compliance of aorta

19
Q

increased SV with all else same–> systolic pressure?

A

increases (i.e. athlete)

20
Q

decreased compliance with all else same –> systolic pressure

A

increases

21
Q

increased stroke volume –> diastolic pressure

A

decreases

22
Q

importance of pulse pressure

A

tells you how volume is moving through the CV system. Pressure felt when feeling a pulse

23
Q

hypertension

A

high resistance in system

24
Q

aortic insufficiency during diastole –> arterial pressure, pulse pressure?

A

arterial pressure drops, pulse pressure rises

25
Q

2 Possible causes of low pulse pressure

A

1) hemorrhage

2) congestive heart failure (damage to heart tissue)

26
Q

3 possible causes of high pulse pressure

A

1) bradycardia (results in slow filling)
2) hypertension
3) decreased aortic compliance

27
Q

measuring diastolic pressure

A

point when flow changes from turbulent to laminar flow when pressure cuff released

28
Q

Normal system vs. pulmonary MAP

A

systemic: 100mmHg, pulmonary: 10mmHg

Decks in Undeleted Class (134):