PSL301: Cardio 6 Flashcards
How much blood goes into the heart each pump?
0.2 L/min
How much blood goes into the brain each pump?
0.7 L/min
Which part of the body does blood flow stay constant?
Brain
Where does the most blood get distributed to?
Liver
Where do 1/4 of the CO get wired to?
Kidneys
Skeletal muscles
What directly affects EDV?
Venous return
What affects venous return?
- Blood volume
- Intrathoracic pressure
- Venous pressure
At the capillaries, blood always picks the vessel with the lowest…
resistance
When one capillary is pinched off, the overall __ is unchanged
flow
Pressure in ventricle varies from…
10 mmHg to 120 mmHg
Formula: MAP
MAP = diastolic P + 1/3(systolic P - diastolic P)
= 2/3(diastolic P) + 1/3(systolic P)
MAP is better known as…
Average blood pressure
Arteries store pressure from left ventricle contraction, then uses ___ to send blood to the rest of the body during ventricular diastole
elastic recoil
Formula: pulse pressure
systolic P - diastolic P
MAP is a function of…
CO
Resistance
Define: pulse
Pressure wave of circulating blood
Where can pulses be felt?
specific
- temperal artery
- facial artery
- carotid arter
- brachial artery
- radial artery
- femoral artery
- popliteal artery
- posterior tibial artery
- dosalis pedis artery
Where can pulses be felt? (general)
pressure points
What sounds are heard while measuring blood pressure?
Korotkoff sounds
5 Korotkoff sounds
- Snap: systolic pressure
- Murmurs
- Taps
- Thumping / muting: 10 mmHg above diastolic
- Silence: diastolic
Stages of hypertension
- Normal
- Hypertension stage 1
- Hypertension stage 2
- Hypertensive crisis (emergency!!)
What is normal blood pressure?
less than 120
Less than 80
(Pre)-hypertension ____ CVD risk
Increases
Positive correlation
MAP is determined by…
- Blood volume
- CO
- Resistance
- Distribution of blood between arteriole & venous system
(1) and (4) are usually pretty consistant
