SHOCK HEMODYNAMICS Flashcards
HEMODYNAMICS
PERFUSION IS PROPORTIONAL TO:
- CO
- Systemic vascular Resistance
- OXYGEN CONTENT
HEMODYNAMICS
CARDIAC OUTPUT IS EQUAL TO?
Stroke Vol x Heart Rate
HEMODYNAMICS
Stroke Vol is affected by (4)
preload
afterload
Contractility
preload - afterload = SV
HEMODYNAMICS
Systemic Vascular Resistance
most common way to increase resistance?
decrease diameter of the blood vessel
HEMODYNAMICS
MAP by way of BP is equal to?
2/3 diastyloic - 1/2 systolic
HEMODYNAMICS
MAP
Mean Arterial Pressure is equal to?
CO x SVR x CVP
CVP is usually so low you can drop it out of the equation
NOTE RELATIONSHIP AND HOW a pt in shock can have adequate BP but no perfusion
HEMODYNAMICS
MAP= CO x SVR x CVP
Perfusion is proportional to CO, SVR, Oxygen content
This explains why there is often low BP and low tissue perfusion simmulatously
HEMODYNAMICS
How do you assess/measure Heart Function?
- BP
- CO
- SVR
- Troponin
- Echocardiogram
- PCWP
- CVP
HEMODYNAMICS
BP =
BP=CO x SVR
HEMODYNAMICS
CO =
CO = SV x HR
HEMODYNAMICS
SV effected by 3 factors
- Preload
- Afterload
- Contractability
HEMODYNAMICS
SV =
SV = Preload - Afterload
HEMODYNAMICS
Tissue Perfusion is proportional to (3)
CO
SVR systemic vascular resistance
Oxygen Content
HEMODYNAMICS
MAP =
MAP = CO x SVR x CVP
CVP is so small it can ge dropped from the equation
HEMODYNAMICS
- What does elevated Troponin level indicate
- What is normal level?
- Troponin ALERT LEVEL?
- How long does Troponin level stay increased?
- Heart muscle damage
- <0.35 ng/ml
- >0.5 ng/ml
- 3 weeks
Davis