79-year-old male with ischemic cardiomyopathy implanted with a Resonate triple-chamber defibrillator
Summary 1
tachycardia episode with atrial rate equal to the ventricular frequency (V>A: False)
initially, Rhythm ID correlation: True; inhibition of therapies
in a second step, Rhythm ID: False; AF: true + stable rhythm (threshold value programmed at 20 ms)
a burst of ATP is delivered
Trace 1 EGM
onset of regular 1/1 tachycardia; first rapid cycle originates in the atrium
after 8 consecutive VT or VF cycles, V-Epsd marker; ventricular complexes are correlated
end of duration; for the device, the rhythm is stable with a diagnosis of AF; therapies not delivered because RID+ (at least 3 correlated ventricular complexes out of 10).
cycle-by-cycle discrimination continues, still with RID+.
RID- (less than 3 correlated cycles out of the last 10); stable rhythm with diagnosis of AF: suspicion of dual tachycardia and a burst of ATP is delivered
arrhythmia termination
Summary 2
tachycardia episode with atrial rate equal to ventricular rate (V>A False)
Rhythm ID: False; AF: false; stable rhythm (threshold value set at 20 ms)
several bursts and ramps are delivered
Trace 2 EGM
regular tachycardia 1/1 same as above
end of duration; RID- (less than 3 correlated cycles out of the last 10); stable rhythm and ATP burst
spontaneous cessation of tachycardia in the ventricle
