A 16-Year-Old Point Guard, a Soft Murmur, and Two Sudden Deaths at Home
Marcus is a 16-year-old point guard presenting for his preseason PPE before varsity basketball tryouts. He reports no exertional chest pain, syncope, palpitations, or unusual dyspnea, and he plays without limitation. Vitals: BP 112/68, HR 58, BMI 22. Examination reveals a grade 2/6 midsystolic murmur at the left upper sternal border that softens with Valsalva, a normal S2 with physiologic splitting, and no clicks or gallops. His mother died suddenly at 44 of an 'enlarged heart'; her brother died at 39 while jogging. Prior PPEs were signed without restriction. An automated ECG reading from last season is on file and labeled 'borderline LVH.' The coach needs clearance by Friday for the first practice, and the parents say the previous physician 'never made a big deal of it.'
1. Rank the findings that drive your decision and explain how you weigh a reassuring physical examination against the family history.
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Findings, heaviest first
- Two close relatives dead suddenly before age 50, one with a reported 'enlarged heart.' This is the dominant data point. Premature sudden death in a family plus a possible cardiomyopathy phenotype raises the pretest probability of hypertrophic cardiomyopathy or another inherited cardiomyopathy/channelopathy far above the population baseline.
- An automated ECG read as 'borderline LVH.' Machine interpretation is not a diagnosis, but abnormal voltage in this family context must be over-read by a cardiologist, not dismissed.
- The murmur is low-yield in isolation. A grade 2/6 midsystolic murmur that softens with Valsalva with a normally splitting S2 is classic for a benign flow murmur. Were this the only finding, clearance without imaging would be defensible.
- Absence of exertional symptoms is reassuring but not exclusionary - many young athletes with HCM are asymptomatic before their first event.
The trap is treating the normal exam as the deciding variable. The exam lowers the probability of resting outflow obstruction; it does not lower the probability of familial disease. In this athlete, further evaluation is indicated regardless of how benign the murmur sounds.
2. What do you do before Friday, and what do you tell the family and the coach? Include what you document.
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Disposition: Do not clear. Refer urgently to pediatric/sports cardiology for an over-read ECG, echocardiogram, and consideration of genetic counseling. The murmur alone would not justify restriction, but an unresolved suspicion of inherited cardiomyopathy does - withhold competitive exertion and high-intensity training pending evaluation. Light recreational activity can usually continue.
To the parents: Name the reasoning explicitly - 'the murmur is probably benign, but the family history is not something I can ignore.' Avoid false reassurance and avoid alarmism; explain that most evaluations end in clearance. Ask them to tell you if any relative has been diagnosed with HCM, long QT, or arrhythmogenic cardiomyopathy, and recommend relatives be screened.
To the coach and athletic director: A written note stating 'not medically cleared pending cardiac evaluation; no restriction of ordinary school activity' with a re-evaluation date. Give no family medical detail - the coach needs a participation status, not a diagnosis.
Documentation: the PPE elements reviewed, the specific family history, the murmur description and maneuver response, the ECG over-read request, the referral, the restriction given, who was notified and when, and the plan for clearance.
3. Cardiology reports a normal echocardiogram and a normal ECG on over-read, and clears him without restriction. What now, and what remains open?
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Clear him fully, document the basis (normal echo, normal ECG, cardiology letter), and give the coach written clearance. Reassure the athlete and family and let him play.
What remains open: the family history is still unexplained. Normal testing in Marcus reduces but does not eliminate the possibility of an inherited condition in the family; the affected relatives were never evaluated. Recommend first-degree relatives be assessed, and offer genetic counseling referral. Tell the family to return if a relative is diagnosed, or if Marcus develops exertional chest pain, syncope, or palpitations.
Do not order serial echocardiograms without indication, and do not carry a permanent 'cardiac' label in his chart.
Practical additions: teach symptom reporting, confirm an athletic emergency action plan and on-site AED at games, and note the episode for next year's PPE so the workup is not repeated from scratch.