Chp 31- Cardiac Output Flashcards
If heart has faulty electrical wiring , then what will happen to the heart?
Heart will become inefficient pump; results in inadequate oxygenation to cells/body systems
Normal Cardiac Output
3.5 to 8L/min
Cardiac output formula
CO= SV x HR
amount of blood the heart pumps/ejects from ventricle with each beat
stroke volume
Stroke Vol depends on what 3 things?
-Amount of blood that enters heart (preload) which determines how much heart can pump out
- Natural Strength of heart/ its contractility
- Resistance to bloodflow in circulatory system (afterload)
the amount of blood in the ventricles before the heart contracts; the stretching of the heart muscle cells before contraction.
preload
the force or pressure the heart must overcome to pump blood out of the ventricles; the resistance to ventricular ejection.
afterload;
Average resting SV
70 mL
Tissue hypoxia has what effect on arteries and blood flow?
Coronary arteries dilate and increases coronary blood flow
As you age, blood vessels experience decrease in elasticity. T or F
True
Decreased elasticity in blood vessels leads to
elevated pulse and elevated BP
When do women see CV changes?
Post menopause due to loss of estrogen which is protective
Optimal Total Cholesterol
<200
Optimal LDL (Bad Chol) levels
<100 mg/ dL
Optimal HDL(Good CHol) levels
> 60 mg/ DL
