Unknown patient monitored during cardiac surgery. Patient is placed on bypass before the start of this encounter.
Rhythm analysis indicates ventricular fibrillation, which converts into asystole.
This encounter shows an extremely erratic rhythm called ventricular fibrillation (VFib), indicated by a chaotic pattern with no QRS or P waves. VFib is considered the most dangerous of heart rhythms. During VFib the heart quivers, producing no meaningful cardiac output. This results in cardiac arrest with no pulse and loss of consciousness. VFib requires immediate cardioversion or death is nearly if not completely certain. In this case VFib leads to asystole or a complete absence of electric activity in the heart.
Source: PhysioNet MGH040