Sideline Collapse in a 17-Year-Old Basketball Player
During a high school basketball game, a 17-year-old center takes an elbow to the chest during a rebound, then walks two steps and collapses. He is unresponsive, apneic, and pulseless. The athletic trainer reaches him within 15 seconds. The school's AED is in the front office, roughly 90 seconds away by sprint. Two coaches and a parent (a nurse) are present. The gym floor is hardwood; there are ~200 spectators. The player had a preparticipation physical 5 months ago that was normal; he had no prior syncope. There is no cervical spine mechanism beyond the chest impact, but he did fall to the floor.
1. What is the most likely cause, and what is the correct sequence of actions in the first 60 seconds?
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Most likely: commotio cordis - a blunt precordial impact during the vulnerable repolarization window producing ventricular fibrillation, in a structurally normal heart. The brief period of consciousness before collapse is typical. Blunt cardiac injury with rupture or a primary arrhythmia is less likely but managed identically in the field.
First 60 seconds:
- Confirm unresponsiveness and absent breathing/pulse (no more than 10 seconds). Do not spend time on a prolonged pulse check.
- Activate EMS and send a designated person for the AED immediately - name the person and the location out loud; do not assume someone is going.
- Start high-quality chest compressions at once: rate 100–120/min, depth ≥5 cm (about one-third AP diameter), full recoil, minimal interruptions. The nurse or a second rescuer can manage the airway with a bag-valve mask if available; do not delay compressions for airway maneuvers.
- Apply the AED as soon as it arrives and follow prompts; resume compressions immediately after each shock. If the AED is 90 seconds away, that is acceptable only because compressions are ongoing - send a runner now rather than later.
- Do not move the patient for spinal precautions unless the scene is unsafe; airway and circulation take priority. Spinal immobilization can be addressed once ROSC is achieved or EMS arrives.
Key teaching point: early defibrillation is the single most powerful determinant of survival in commotio cordis; survival falls roughly 10% per minute of delay.
2. The AED arrives, delivers one shock, and the player remains pulseless. EMS arrives 6 minutes later and achieves ROSC after a second shock. In the ED he is awake and neurologically intact. What is the evaluation and return-to-play discussion?
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Evaluation:
- 12-lead ECG (looking for long QT, Brugada pattern, pre-excitation, HCM/repolarization changes), echocardiogram (structural disease, wall motion, valve function), and cardiac MRI if there is any concern for myocardial contusion or an underlying cardiomyopathy. Troponin and serial ECGs to assess for blunt myocardial injury.
- Genetic/inherited arrhythmia evaluation is not mandatory for a classic commotio cordis with a clear precordial blow, normal ECG, normal echo, and no family history - but a family history of sudden death, syncope, or an abnormal ECG should prompt further workup (e.g., long QT, CPVT, Brugada).
- Consider coronary evaluation only if the mechanism or findings suggest it; in a 17-year-old it is usually unnecessary.
Return to play: With confirmed commotio cordis, a structurally normal heart, and full recovery, most consensus guidance supports return to competitive sports after a period of recovery and complete evaluation, typically weeks rather than months, once myocardial contusion (if any) has resolved and the ECG/echo are normal. This is a genuinely individualized decision and should involve a cardiologist and shared decision-making with the family.
Prevention discussion - this is what the exam is really testing:
- Ensure the school has an emergency action plan, an AED on site and accessible within 3 minutes, and annual drills.
- Commotio cordis is not prevented by the preparticipation exam - a normal PPE does not exclude it. This should be explained to the family, who will likely ask "how did the physical miss this?"
- Discuss chest protectors (limited and inconsistent evidence, particularly in baseball/lacrosse) and rule changes; do not overpromise protection.