Ventricular Fibrillation in Commotio Cordis

Clinical Presentation and Diagnosis

Immediate collapse following chest impact in a young, healthy athlete indicates a primary electrical event rather than structural cardiac injury, according to the American Heart Association 1
The typical demographic for commotio cordis is a young, healthy athlete without underlying cardiac disease, as stated by the American College of Cardiology 2
Witnessed arrest with immediate pulselessness strongly suggests a shockable rhythm (VF/VT) rather than asystole or PEA, as recommended by the American Heart Association 3

The American Heart Association recommends immediate defibrillation once a monitor/defibrillator is available, with a single shock followed immediately by CPR, given modern biphasic defibrillators have >90% first-shock efficacy 3, 7, 8
Minimize interruptions in chest compressions, with rhythm checks occurring only after approximately 2 minutes (5 cycles) of CPR, as suggested by the American Heart Association 3, 7, 8
The energy dose for biphasic truncated exponential waveform should be 150-200 J, or 120 J for rectilinear biphasic waveform, as recommended by the American Heart Association 3, 7

Witnessed arrest with immediate bystander CPR is a key prognostic factor favoring survival, according to the American Heart Association 6
Shockable rhythm (VF) rather than asystole or PEA is a key prognostic factor favoring survival, as stated by the British Medical Journal 4, 6
Rapid defibrillation within 3-5 minutes of collapse is crucial for survival, as recommended by the American Heart Association 6