Physio Exam 2 Formulas Cardiovascular

Front 1

Velocity of blood flow =

Back 1

flow/ cross-sectional area

v= Q/A
Q = flow (ml/sec)
A = πr 2

Front 2

Relationships between blood flow,
pressure, and resistance?

Back 2

Q = ΔP/R
where,
Q = flow (ml/sec)
ΔP = pressure difference (mmHg)
R = resistance (mmHg/mL/min)

Front 3

Calculate Resistance (standard equations)

Back 3

R = ΔP/Q
Pressure/Flow

Front 4

Calculate Resistance using Poiseuille’s Equation

Back 4

resistance=
(8)(viscosity of blood)(length of the blood vessel)
_______________________
(3.14) r 4


Can be simplified as 1/r 4

Front 5

Formula for Series Resistance

Back 5

R total = R artery + R arteriole + R capillary + R venule + R vein

Front 6

Formula for parallel Resistance

Back 6

1/R total = 1/R artery +1/ R arteriole + 1/R capillary + 1/R venule + 1/R vein

Front 7

What is Reynolds number and what is the equation?

Back 7

a dimensionless number that predicts turbulent or laminar flow

(density of blood)(diameter of vessel)(velocity of flow)
(/ -DIVIDED BY)
viscosity of blood

Front 8

What is the Vessel Compliance Equation?

Back 8

compliance(ml/mmHg)=
V = volume (ml)/P = pressure (mmHg)

Front 9

Duration of the cardiac cycle (formula)

Back 9

Time for one pump.
60 (sec/min) ÷÷ heart rate (beats/min)

Front 10

Stroke Volume

Back 10

End diastolic volume – end systolic volume

Front 11

Ejection fraction:
What is it?
What's the Equation:

Back 11

Fraction of the EDV that is ejected in one SV
(Stroke Volume/End Diastolic Volume) X 100% „

Front 12

What is Cardiac output?

Back 12

‹‹ Total volume of blood ejected per unit time
‹‹ (stroke volume) X (heart rate)

Front 13

What is Cardiac index?

Back 13

‹‹ The cardiac output normalized for body surface area
CI = CO ÷÷ SA

Front 14

Left ventricular stroke work Equation LVSW (2)

Back 14

SV x left ventricular pulse pressure
SV x Mean Arterial Pressure

Front 15

How do you measure isovolumic indices?

Back 15

can get rate of ventricular P changes during isovolumiccontraction (+dP/dt) with catheterization

Front 16

Mean Arterial Pressure Equation

Back 16

diastolic pressure + 1/3(pulse pressure)

Front 17

Left Ventricular minute work (LVMW) equation actual and estimated...

Back 17

LVSW x HR
or
SV x MAP x HR

Front 18

Fick method for calculating cardiac output

Back 18

O2Consumption
_____________
(arterial O2)- (venous O2)

Front 19

Calculate TPR...

Back 19

Can use equation
(Mean Arterial Pressure - Mean Venous Pressure) / Cardiac Output
or
(ΔP = MAP – WEDGE/COutput)

or
(ΔP = MAP – RAP)

Front 20

Pulmonary capillary wedge pressure is approximately equal to what other value?

Back 20

left atrial pressure