Should a 42-year-old man with low-density lipoprotein cholesterol of 140 mg/dL, total cholesterol of 214 mg/dL, and a first-degree relative who had a myocardial infarction and dyskinesia be started on a statin?

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Last updated: October 3, 2026 • View editorial policy

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Yes, this 42-year-old man should be started on a statin.

Based on the 2018 ACC/AHA guidelines, this patient has a risk-enhancing factor (family history of premature MI in a first-degree relative) that strongly favors statin initiation, even at intermediate calculated risk levels 1.

Risk Assessment and Rationale

This patient's clinical profile includes:

  • LDL-C of 140 mg/dL (above the threshold of ≥70 mg/dL for consideration)
  • Age 40-75 years (within guideline-specified range)
  • Family history of premature ASCVD (first-degree relative with MI) - this is explicitly listed as a risk-enhancing factor

The 2018 ACC/AHA guidelines specifically identify "family history of premature ASCVD" as a risk-enhancing factor that favors statin therapy initiation in patients with intermediate risk (7.5-19.9% 10-year ASCVD risk) and may even favor therapy in borderline risk patients (5-7.5%) 1. Given his age of 42 and family history, his calculated 10-year risk likely falls in the intermediate range.

Treatment Recommendation

Start moderate-intensity statin therapy with the goal of reducing LDL-C by at least 30% 1. This would target an LDL-C of approximately 98 mg/dL or lower.

Specific statin options include:

  • Atorvastatin 10-20 mg daily
  • Rosuvastatin 5-10 mg daily
  • Simvastatin 20-40 mg daily

Follow-up Strategy

  • Recheck lipid panel in 4-12 weeks after statin initiation to assess adherence and response 1
  • If the patient's 10-year ASCVD risk calculates to ≥20%, consider high-intensity statin therapy to achieve ≥50% LDL-C reduction 1

Important Caveats

Before initiating therapy, conduct a clinician-patient risk discussion that includes:

  • Review of his family history and its implications
  • Potential benefits of statin therapy for primary prevention
  • Potential adverse effects and drug interactions
  • Patient preferences and values 1

If uncertainty remains after risk discussion, consider measuring coronary artery calcium (CAC) score. However, given the strong family history, even a CAC of zero should not necessarily defer treatment, as the guidelines specifically note that family history of premature ASCVD is an exception to withholding statins when CAC is zero 1.

The presence of a first-degree relative with MI represents familial clustering of cardiovascular risk, which research confirms is associated with elevated lipoprotein(a) and other lipid abnormalities in relatives 2. This genetic predisposition justifies more aggressive primary prevention.

References

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