Trigger · 01Your ECG decides when everything happens.
Three cuff pairs are wrapped around both legs: calves, lower thighs, then upper thighs and buttocks. ECG electrodes on your chest feed the console, which finds the R wave of every beat and works out where systole ends and diastole begins. A finger sensor reads the pressure wave the treatment produces.
Timing sourceChest ECG · R wave
Systole · 02While the heart contracts, the cuffs stay open.
During systole the heart ejects into the aorta, and the squeezed heart muscle briefly closes off its own coronary vessels. Nothing is inflated at this moment, because pressure now would only make the heart push harder.
Cuff stateFully deflated
Inflate · 03The heart relaxes, and pressure runs up the legs.
At aortic valve closure (the dicrotic notch), the calf pair pressurises first, then the lower thighs, then the upper thighs and buttocks, roughly fifty milliseconds apart. Squeezing bottom-upward drives blood in the legs back toward a heart that is now relaxed and filling.
Inflation orderCalf → thigh → upper · ~50 ms apart
Augment · 04A second pressure peak appears during diastole.
That returning wave lifts aortic pressure at the exact moment the coronary arteries fill, and more blood arrives back at the heart for the next beat. On the pressure trace it shows as a diastolic peak that can rise above the systolic one, and the team tunes timing by watching that D/S ratio.
Diastolic augmentationD/S ratio target ≥ 1.0
Release · 05All cuffs drop together, just before the next beat.
Deflation is simultaneous and fast, timed ahead of the next R wave. The leg vessels empty, resistance falls, and the next contraction meets less afterload. The ECG itself is unchanged. It is the input, not the result. What changes is the pressure the heart works against.
DeflationAll cuffs · before the R wave
Repeat · 06Every beat is re-timed, for about an hour.
The console re-reads the ECG beat after beat and shifts inflation and deflation as your rhythm changes. A commonly used course is 35 sessions of about an hour, with rhythm, blood pressure, symptoms, and cuff comfort checked throughout.
Cycle controlRe-timed every beat