Cardiovascular alterations murmur case discussion guide
A 16-year-old cleared at his sports physical despite an apical systolic murmur later collapses and dies — post how you would have diagnosed and treated him, then run one patient factor (genetics, ethnicity, or behavior) through the diagnosis and prescription.
Editorial process
Last reviewed · August 12, 2026
What should the murmur have triggered before clearance?
The scenario is a tragedy told backwards, and the post's real question is what should have happened at the examination: a 16-year-old with a grade II/VI systolic murmur loudest at the apex, no symptoms, no family history — cleared without restriction, dead on the field later that season. The murmur's characteristics are the diagnostic thread the discussion wants pulled. An asymptomatic athlete with an apical systolic murmur is the textbook presentation in which hypertrophic cardiomyopathy must be excluded before clearance, because it is the leading cardiac cause of sudden death in young athletes and its murmur famously intensifies with maneuvers that reduce preload — the Valsalva and standing checks the described examination never performed. A defensible post walks the workup that clearance should have required: dynamic auscultation, a 12-lead ECG, and echocardiography before any clearance decision, with referral to cardiology — stating plainly that an undetermined murmur in a competitive athlete is a hold-the-clearance finding, the decision the examiner got wrong.
The treatment half of the post follows the diagnosis: for hypertrophic cardiomyopathy the prescription conversation includes beta-blockade as first-line symptom therapy, activity restriction decisions guided by current recommendations, family screening, and in risk-stratified patients defibrillator discussion — but write it conditionally, as what you would prescribe once the echo confirms, because the scenario deliberately withholds the confirmed diagnosis and the honest post reasons under that uncertainty. The absent family history is worth a sentence of skepticism too: a negative history is only as good as the family's knowledge of it, and sudden deaths attributed to drowning or accidents hide cardiac events, which is why the screening literature treats history alone as insufficient and why several screening protocols add the twelve-lead ECG despite the false-positive debate. Acknowledging that debate in a sentence — sensitivity gained against follow-up burden — is the kind of honest nuance this discussion format rewards.
The factor selection — genetics, ethnicity, or behavior — should be chosen for what it changes, and genetics changes the most here: hypertrophic cardiomyopathy is autosomal dominant in a majority of cases, which converts the diagnosis from one patient's finding into a family's cascade-screening obligation and makes genetic counseling part of the prescription. An ethnicity post can work through documented differences in screening ECG interpretation and sudden-death epidemiology; a behavior post through the interaction of training intensity with an undiagnosed substrate — but whichever factor you take, the requirement is the same mechanism-level sentence: how the factor alters what you diagnose, how confidently, and what you prescribe. Ground the post in the assigned pathophysiology chapters and close with the screening question the scenario dramatizes: what a preparticipation examination must include before it clears a heart it has just heard murmur.
Likely learning objectives
Inferred from the brief — check these against your own rubric.
- 01Recognize the asymptomatic athlete with an apical systolic murmur as an exclude-HCM-before-clearance presentation.
- 02Reconstruct the required workup: dynamic auscultation, ECG, echocardiography, and cardiology referral before any clearance.
- 03Prescribe conditionally under diagnostic uncertainty, stating what confirmation would trigger which therapy.
- 04Run one factor — genetics, ethnicity, or behavior — through diagnosis and prescription at mechanism level.
- 05Treat a negative family history with the skepticism the screening literature requires.
Read the full question
Review every instruction before using the planning guidance that follows.
Turn the brief into deliverables
- 01A discussion post describing how you would diagnose the patient in the scenario, grounded in the assigned pathophysiology readings.
- 02A treatment and prescription approach for the working diagnosis, written under the scenario's uncertainty.
- 03An explanation of how your selected factor (genetics, ethnicity, or behavior) impacts the diagnosis and prescription.
How do the diagnosis, treatment and factor halves connect?
The murmur, taken seriously
Read the scenario's finding — grade II/VI systolic, loudest at the apex, in a 16-year-old athlete — and argue the working diagnosis that must be excluded before clearance.
The workup clearance required
Sequence what the examination should have triggered: dynamic auscultation with preload maneuvers, a 12-lead ECG, echocardiography, and cardiology referral, with clearance held meanwhile.
Treatment under uncertainty
Prescribe conditionally: beta-blockade as first-line once confirmed, activity restriction per current recommendations, family screening, and risk-stratified defibrillator discussion.
The factor, run through
Apply the selected factor — genetics' autosomal-dominant cascade obligations, ethnicity's screening-interpretation differences, or behavior's training-substrate interaction — to the diagnosis and prescription.
The screening lesson
Close with what the preparticipation examination must include before clearing a murmur of undetermined cause — the population-level point the tragedy dramatizes.
Where are HCM, murmurs and athlete screening documented?
Recommended databases
- Assigned text (Huether & McCance, Chapters 23-25)
- PMC
- NCBI Bookshelf
Search sequence
- 1.Read the assigned chapters on cardiovascular alterations, including the pediatric chapter the scenario is keyed to.
- 2.Review the murmur-physiology reference for the characteristics that separate innocent from pathological murmurs.
- 3.Read the athlete cardiac-screening literature for what preparticipation examinations catch and miss.
- 4.Check the hypertrophic cardiomyopathy reference for inheritance, presentation and management before writing the factor section.
Reference shortlist
These are authoritative starting points, not a ready-made bibliography. A qualified reviewer must confirm that each source fits the assignment and supports the claim beside which it is cited.
Nothing here is cleared for citation until you have read it.
- 01
Hypertrophic Cardiomyopathy
StatPearls, NCBI Bookshelf · 2024
The working diagnosis at depth: presentation, autosomal-dominant genetics, murmur behavior with preload, and management — the substance of the diagnosis, treatment and genetics-factor sections.
- 02
Physiology, Cardiovascular Murmurs
StatPearls, NCBI Bookshelf · 2024
The murmur-characterization framework — grading, location, maneuvers — that turns the scenario's II/VI apical finding into a diagnostic argument.
- 03
Cardiac Screening in Young Athletes: The Role of Diagnostics in Preventing Sudden Cardiac Death
PMC / National Library of Medicine · 2025
The preparticipation-screening evidence the closing lesson draws on — what history and auscultation alone miss, and where ECG and echo change outcomes.
Review before submission
Common mistakes
- Retelling the scenario instead of reconstructing the missed workup — the post's verb is diagnose, not narrate.
- Treating the grade II/VI murmur as benign because the patient was asymptomatic; the apex location and athlete context are the alarm.
- Prescribing as though the diagnosis were confirmed when the scenario deliberately withholds the echo.
- Accepting the negative family history at face value — the screening literature treats history alone as insufficient.
- Choosing a factor and describing it generally instead of tracing what it changes in this diagnosis and this prescription.
- Skipping the preparticipation-screening implication, which is the population-level point the scenario exists to teach.
Submission checklist
- Working diagnosis argued from the murmur's characteristics and the athlete context.
- Workup sequence stated: maneuvers, ECG, echo, referral — before clearance.
- Treatment written conditionally on confirmation, with the major options named.
- One factor selected and traced through diagnosis and prescription mechanisms.
- Assigned readings cited; the screening lesson drawn.
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Written by
Aaron Bishop
MA, Education
assignment interpretation and research-methods coaching across disciplines
Aaron leads the EssayCrackers editorial desk. He works on how assignment briefs are read — what a rubric is actually asking for, and where students most often answer a different question than the one set.
Reviewed by
Dr. Nathan Cole
PhD, Rhetoric & Composition
Argumentation and thesis development
Nathan teaches first-year composition and directs a university writing center. He reviews EssayCrackers guides for argumentative soundness and citation accuracy.