A.M.I Italia Saver One P, Руководство пользователя

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9.1.2
Synchronized Defibrillation
Synchronous defibrillation or synchronized cardioversion is an electrical therapy used to treat certain types of
arrhythmias, other than VF. During VF the ECG appears irregular and chaotic and lacks identifiable P, Q, R, S and T
waves.
The defibrillation pulse can, therefore, be released at any time as there are no detectable periods of vulnerability. The
other types of arrhythmias instead have identifiable waveforms and a well-defined period of vulnerability, during
which a defibrillation pulse may cause VF. Unlike defibrillation, in which energy is released asynchronously with
respect to the cardiac cycle, a synchronized shock releases energy during ventricular depolarization. This
synchronization is achieved through QRS detection, this method makes it possible to identify the QRS complex of the
patients (often referred to, speaking of cardioversion, as R-wave).
The Defibrillator searches for the R wave on the basis of certain criteria that distinguish it from the other waves
making up the ECG (e.g. its amplitude) and when this is detected, the defibrillator places an "R" flag in that wave.
When the defibrillator is charged in synchronous mode, it will release energy (after pressing the shock button) only
when an R-wave is detected. If the rhythm to be converted is rapid, the defibrillator cannot detect all R-waves, but
only every second, third, or fourth one.
Cardioversion can be used to treat atrial fibrillation or flutter and certain atrial, ventricular or junction tachycardias.
After activating this mode, the following screen will appear on the
Saver One P display:
Once selected, to exit the "Manual Synchronous" mode, you must select a different mode or turn off the Saver One P.
Figure 33
Figure 34