Second-Degree AV Block · Mobitz II

Atrial impulses intermittently fail to conduct without progressive PR lengthening.

Programmatically generated teaching example. Morphology and supporting values are simplified.

Typical rate: Ventricular rate below atrial rate
Regularity: Intermittent pauses
P waves: Regular; some are not conducted
PR interval: Constant in conducted beats
QRS: Often wide

Sources and review status

This guide uses RhythmDock’s centralized educational definitions. See reference sources and limitations. Published September 13, 2026. Independent medical review is pending; this is not a clinical interpretation tool.