Formulas

Question 0

Regurgitant fraction

Answer 0

SV (angio) - SV (thermo)
----------------------------
SV (angio)
Or 
CO (angio) - CO (thermo) 
-----------------------------
CO(angio)

Question 1

Formula for blood pressure

Answer 1

Heart rate X stroke Volume X SVR

Question 2

Ejection fraction

Answer 2

EDV-ESV/EDV

Question 3

Stroke volume

Answer 3

EDV - ESV

Question 4

Angiographic cardiac output

Answer 4

SV (ml) x HR/ 1000

Question 5

Cardiac index

Answer 5

CO/BSA

Question 6

AVF. Aortic valve flow

Answer 6

SEP (Sec/min)

Question 7

What is the gorlin formula aortic valve constant

Answer 7

44.5

Question 8

AVA. Aortic valve area

Answer 8

AVF

44. 5 x square root of mean gradient

Question 9

Haaki formula for valve area

Answer 9

Square root of the peak to peak lv AO pressure gradient.

Question 10

What is the mitral valve gorlin constant?

Answer 10

37.7

Question 11

Systemic blood flow SBF

Answer 11

Systemic arterial 02 - MO2 content x10

(RAo2 or RVo2) is MO2

Question 12

How do you convert hybrid resistance units to absolute resistance unit

Answer 12

Multiply by 80

Question 13

Pulmonary blood flow (PBF)

Answer 13

Pulmonary venous o2 - pulmonary artery o2 x 10

Question 14

Calculate Qp/Qs ratio

Answer 14

(PV o2 - PA o2)

Question 15

(PVR)

Answer 15

PBF X 80

PBF = CO as long as ther isn’t a shunt

Question 16

Fick Cardiac Output

Answer 16

VO2 /

(hgb x AO sat x constant)-(hgb x PA sat x constant) x 10

Question 17

Systolic vascular resistance

Answer 17

SBF. X 80

SBF = CO as long as there isn’t a shunt

Question 18

What is resistance

Answer 18

The Amount of work necessary to push blood out of the systemic or pulmonary systems

Question 19

SEP systolic ejection period

Answer 19

The amount of time the AO valve is open for blood to be ejected out of the Aortic valve

Question 20

DFP. diastolic filing period

Answer 20

Amount of time the mitral valve leaflets are open for blood to eject out.

Question 21

If the shunted blood flow is a negative number, does that indicate a R-L shunt or L-R shunt

Answer 21

R-L shunt