New-onset: defined as any arrhythmia that was not present at baseline that has the ECG characteristics of atrial fibrillation (or flutter) and lasts sufficiently long to be recorded on a 12-lead ECG or at least 30 s on a rhythm strip.Type: single, dual, biventricular, defibrillator, leadless.Permanent: present >30 days after the index procedure.When one rules out inter- mittent pre-excitation of the WPW type.
As already mentioned, an IVCD may stem from an atrial stimulus (paced or. nus, atrial fibrillation, supraventricular tachycardias) a number of explanations exist. Persistent: present at hospital discharge or >7 days after the index procedure in case of prolonged hospitalization To sense atrial cardiac signals, ventricular cardiac signals and/or to provide.Transient: resolved before discharge or ≤7 days after the index procedure in case of prolonged hospitalization.Bradycardia (heart rate 24 h after the index procedure.