ECG Quiz: Collapse in a Young Runner.

An 18-year-old woman who ran four times weekly and played competitive soccer was approximately 1 mile into her standard running route when she collapsed. At the scene, a bystander summoned help and began cardiopulmonary resuscitation (CPR). Emergency medical service personnel arrived and found the patient unresponsive. She had no pulse or spontaneous respirations and was generally cyanotic. CPR was continued and a rhythm strip obtained (figure 1). The patient was resuscitated and brought to a hospital emergency department.