t^» > je >§ PS >!§ nSi >8 i>8 > S >v§ >S >•:

Figure 6.8a. Ventricular intervals (Grey for VF, Black for VT1); ventricular bipolar electrogram.

t^» > je >§ PS >!§ nSi >8 i>8 > S >v§ >S >•:

5. The atrioventricular relationship is unclear (no atrial channel).

6. Therapy is not displayed, but the transmission says that ATP was given.

Electrogram at subsequent consultation

Electrogram at subsequent consultation

Cardiac Electrogram Vfib
Figure 6.8b. From top to bottom: ventricular marker channel with ventricular intervals; ventricular wide-band and bipolar electrograms (respectively HV and V). VF = ventricular fibrillation; VT1 = ventricular tachycardia; VP = ventricular pacing; VS = ventricular sensing.

1. Tachycardia: confirmed.

2. Assessment of the onset of the tachyarrhythmia: the baseline rhythm is probably atrial fibrillation. After a rather long pause a VPB is followed by a regular tachycardia with a different, wide QRS morphology and a cycle length as was transmitted in the former electrogram.

3. The atrioventricular relationship remains unclear (see above).

4. ATP (7 pulses) restores the initial rhythm, interrupted by a ventricular premature beat.

Diagnosis: atrial fibrillation, followed by sustained monomorphic ventricular tachycardia.

Actions: none. The home monitoring was continued.

Dual Chamber Devices

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