Overview
Open Clinical controls → Baseline vitals → Rhythm and choose Pre-Excited Atrial Fibrillation. The rate and atrial/ventricular timing follow this rhythm’s model.
Irregular rapid ventricular activation with beat-to-beat changes in QRS width, amplitude and fusion, slurred pre-excited upstrokes and secondary repolarization changes. No organized atrial contraction; mechanical pulses vary. Above 120 bpm, the teaching model adds progressively worse filling, lower BP/output and higher wedge pressure, especially with left-heart disease. The size of the response is illustrative, not a universal property of pre-excitation.
The disease state remains active. Disease morphology, treatment and temporary pacing can modify the displayed result; use the effective rate and the current twelve-lead read.