Pacemaker necessary |
Pacemaker probably necessary |
Pacemaker not necessary |
Symptomatic patients with fascicular block and significantly prolonged H-V interval by electrophysiologic study |
Patients with syncope and bifascicular or trifascicular block with other etiologies of syncope excluded |
Asymptomatic fascicular block without AV block |
Symptomatic patients with block distal to His at atrial paced rates of less than 100-120 bpm |
Pacing-induced block distal to His at atrial paced rates of less than 130 bpm |
Asymptomatic fascicular block and first degree AV block |
Symptomatic patients with bifascicular block and intermittent type II second degree AV block or third degree AV block |
Asymptomatic patients with fascicular block and intermittent type II second degree or third degree AV block |
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