Ejection Fraction Percent of blood?
55%a
Equation for CO
CO=SVxHR
What is the name for Cardiac Output
Fick Equation
Fick’s Equation =
CO= [VO2/(A-V)] * 100
What does a-v stand for
how much O2 the muscles extract for work
Average cardiac output for male and female
male 5 L/min
female 4 L/min
how many ml O2/L of blood
200 ml O2/L of blood
if 5 L CO, whats the mL oxygen available?
1000ml O2
how much O2 in ml/min is used?
250-300 ml/min O2 @ rest
What is our O2 reserve?
750ml O2 reserve
1L blood = ? O2
200ml
Direct neural supply of HR is by
Ventro-Lateral Medulla
What are the 2 systems of indirect HR control (increasing HR?)
SNS and PNS
What 2 SNS chemicals and 2 effects on HR?
Catecholamines- epinephire and norepinephrine
+chronotropy
+inotropy
What is the 3rd indirect system (only) that decreases HR?
Vagus nerve
How does Vagus nerve affect HR? Chronotropy or Inotropy?
NO inotropy
when does mycardium reciegve blood
diastole
Is heart muscle aerobic or anaerobic
Myocardium is Aerobic
3 sources of energy for heart?
glucose
fatty acid
lactate from glycolysis in muscle
@ rest, heart extracts __? O2 from coronaries?
70-80% O2 from coronaries
equation for BP?
BP= CO * TPR
TPR is reflected by Systole or Diastole?
TPR is refleted by diastole
Capacitance system ___ % of blood at rest in the veins?
60%
Volume of blood in each RESTING minute
__ml O2 entering bloodstream
250 ml O2