IABP Graph Analysis

For analysis of graph first put patienton 2:1 Augmentaion

Normal Graph

DIA: Unassisted End Diastolic Pressure
SYS: Unassisted Peak Systolic Pressure
AUG: Diastolic Augmentation/Peak Diastolic Pressure
ADIA: Assisted End Diastolic Pressure
ASYS: Assisted Peak Systolic Pressure (Systole after IAB deflation)
DN: Dicrotic Notch




Early Inflation

Inflation of Valve before dicrotic notch

Can be identified by drawing a line from dicrotic notch of unassisted pulse

Forced closure of Aortic valve
Reduces Stroke volume

Increased LV End diastolic volume(LVED)

Increased work load

Late Inflation

Dicrotic notch is visible brfore augmented diastolic graph 

AUG less than optimum

Decreased perfusion pressure and volume to coronary arteries  



Early Deflation

Augmented Systolic =Non augmented systolic pressure

U shape  at Augmented end diastolic pressures

No afterload reduction


Late Deflation

 Augmented end diastolic pressure > Non Augmented end Diastolic pressure
Violates rule 2for deflation