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Atorvastatin-Associated Severe Bradyarrhythmia Following Multiorgan Dysfunction: A Case Report
Xiao-Qing Kou1,2,3, Yan-Zhen Wang1, Yi-Rong Gan1
1Institute of Cardiovascular Diseases Lanzhou First People's Hospital Lanzhou Gansu Province China.
Clinical Case Reports
|August 2, 2026
Summary
High-dose atorvastatin self-adjustment can lead to severe bradyarrhythmia and multiorgan dysfunction. Patients should not alter statin doses without medical supervision to prevent serious adverse events.
Area of Science:
- Cardiology
- Pharmacology
- Internal Medicine
Background:
- Statins are essential for managing hypercholesterolemia and preventing atherosclerotic cardiovascular disease.
- While generally safe, high-dose statin use or unsupervised adjustments can precipitate serious adverse effects.
Purpose of the Study:
- To report a case of severe bradyarrhythmia and multiorgan dysfunction potentially associated with self-adjusted high-dose atorvastatin.
- To emphasize the importance of medical supervision and patient education regarding statin dosage adjustments.
Main Methods:
- Case report of a 66-year-old male with hypertension and hyperlipidemia.
- Clinical evaluation, electrocardiography, laboratory tests, and pacemaker implantation.
- Follow-up assessment of sinus rhythm recovery and pacemaker burden.
Main Results:
- The patient developed syncope, sinus arrest, and acute hepatic, renal, and electrolyte dysfunction after increasing atorvastatin dose.
- Temporary pacing and supportive care normalized organ function, but persistent sinus node dysfunction necessitated a permanent pacemaker.
- One-year follow-up indicated partial recovery of sinus rhythm but ongoing sinus node dysfunction.
Conclusions:
- The case suggests atorvastatin-associated severe bradyarrhythmia may be mediated by multiorgan dysfunction rather than direct sinus node injury.
- Highlights the critical need for patient education against self-adjusting statin doses and for monitoring adverse events with high-dose statin exposure.
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