BLOOD PRESSURE AND PULSE PRESSURE Flashcards Preview

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Flashcards in BLOOD PRESSURE AND PULSE PRESSURE Deck (15):
1

Systolic pressure

- blood rushing to occluded vessel
- turbulence flow going to a narrow vessel
- pressure from the heart
- from CO and vessel compliance stiffness of vessel
- the main factor in determining SYSTOLIC PRESSURE IS STROKE VOLUME
- increase SV= increase systolic blood pressure VIA
-decrease HR reflex increase SV or increase preload, decrease compliance stiff vessels = increase systolic blood pressure

2

Diastolic pressure

- disappearance of sound
- 80 mm Hg
- coming from the radius and RESISTANCE OF THE VESSEL (TPR) against the flow of blood
- calcified blood vessel walls
- main factor determinant is TPR which is determined by the resistance of arterioles
- dilatation of arteriole decreases diastolic blood pressure
- constriction of arterioles increase diastolic blood pressure
- decrease in heart rate or stroke volume will also decrease diastolic blood pressure due to decrease in flow in the system

3

SYSTOLIC/DIASTOLIC

- assessing CO/TPR

4

pulse pressure(PP)

- difference systole-diastole
- increase systole
- decrease diastole
- increase PP

5

systolic pathophysiology

- increase systolic pressure
- increase CO= increase HR constant SV via
- decreases vessel compliance

6

diastolic pathophysiology

- TPR resistance is inverse to radius
- dilate arteries decrease TPR
- decrease diastolic pressure
- arteriolar dilators (Ca channel blockers, alpha 1 blocker)
- decrease diastolic pressure
- stiff vessel or loose vessel compliance will give a lowered or false reading diastolic pressure

7

BP 144/110

- immediate goal is to decrease diastolic pressure
- goal is to decrease TPR
- drug that will decrease the radius (radius is inverse to resistance)
- ACE inhibitor, Ca channel blocker, alpha 1 blocker

8

widening of PULSE PRESSURE

- increase in stroke volume(systolic>diastolic)
- decrease in vessel compliance (systolic increase and diastolic decreases)
- aorta is the most compliant artery in the systemic system
- peripheral arteries

9

pulse pressure increases

- as we go distally, arteries distal to the heart go down the system (peripheral artery)

10

pulse pressure decreases

- as we go near to the heart

11

mean arterial pressure

- 2/3 diastolic pressure + 1/3 systolic pressure
- diastolic pressure + 1/3 of pulse pressure
- closed that diastolic pressure by that better index in determining MAP than systolic pressure
- CO=MAP/TPR

12

which of the following vessel is expected to have the highest pressure/MAP in a standing person

- lying down
arterial pressure in the AORTA(93) is 100mm Hg mean pressure
venous RA 0-2 mmHg mean pressure head to toe pressure is 0
- gravity adds 80 mm Hg to the system
- arterial pressure from 100 lying down then standing up add 80 mm Hg hence arterial pressure is 180 mm Hg (PEDAL VEIN)
- venous pressure is 0 lying down upon standing up adds up 80 mm Hg hence venous pressure is 80 mm Hg on the PEDAL VEIN due to gravitational pull + gravitational force
- LOWEST ARTERY= FEMORAL ARTERY

13

jugular venous pressure

- diagnosis of RV failure
- RV is increase and back off in the RA and backs off into the IVC then into the jugular veins
- 45 degrees sitting

14

supine to upright posture

- pressure in the dependent VEINS INCREASES
- BLOOD VOLUME in dependent VEINS INCREASES
- CO DECREASES (circulating blood volume) due increase in pool volume
- DECREASE SV AND PRESSURE
- BP DECREASES
- as a compensation via CAROTID SINUS REFELEX
TPR INCREASES, HR INCREASES due to sympathetic stimulation
- no compensation on BP develop ORTHOSTATIC HYPOTENSION

15

in SPACE ASTRONAUTS

- INCREASE BP due to weightlessness no gravity pull