Cardiac Equations Flashcards
MAP=?
CO*TPR
CO?
SV*HR
CO? (fick’s principle)
CO = Rate of O2 Consumption/ (arterial O2 content − venous O2 content)
Pulse pressure is proportional to?
SV
Pulse pressure=?
Systolic-diastolic
SV=?
EDV-ESV
In Early Exercise=> CO is maintained by?
HR and SV
In Late Exercise=> CO is maintained by?
HR only
With increased HR, what happens to CO?
CO decreases=>decreased filling time
pulse pressure increases in places where?
heart works too much+aortic regurg
pulse pressure decreases in places where?
heart doesn’t work+aortic Stenosis
SV is affected by?
CAP
Contractility=increases SV
Preload=increases SV
Afterload=>decreases SV
What happens to contractility with decreased extracellular Na+?
Increased contractility
What happens to contractility with acidosis?
Decreased contracility
What increases O2 demand?
Increased Contractility
Increased Afterload
Increased HR
Increased Diamter/Wall tension
Why does a the heart hypertrophy?
to decrease wall tension
In diastolic HF,
EF is normal
Flow (Q) and Resistance Equations
Q=∆P/R
FPR
Surface Area and Velocity equation
Q=v*A
