Objective: To investigate the effect of different doses of atorvastatin on patients with acute ST segment elevation myocardial infarction (MI) after emergency percutaneous coronary intervention (PCI).
Methods: A total of 265 patients with acute ST segment elevation MI who underwent emergency PCI were enrolled, 133 in high-dose atorvastatin administration (40 mg/day) and 132 in moderate-dose atorvastatin administration (20 mg/day). All the patients continued treatment for 1 year. The incidences of major adverse cardiovascular events (MACE) were recorded, including cardiovascular death, spontaneous MI, and unplanned revascularization. The association between clinical incidences and different doses of atorvastatin treatment was studied.
Results: Through tracking 1 year's treatment, the level of low-density lipoprotein cholesterol was lower in high-dose atorvastatin administration than in moderate treatment (1.6 ± 0.6 vs. 1.8 ± 0.6, P = 0.041). MACE significantly decreased in high-dose atorvastatin administration than in moderate treatment (9.8 vs. 18.2%, P = 0.03). Spontaneous MI was significantly more attenuated in high-dose treatment than in moderate treatment (6.8 vs. 12.8%, P = 0.03). Unplanned revascularization robustly decreased in patients with high-dose administration than those with moderate-dose treatment (5.2 vs. 8.3%, P = 0.03). There was no difference in the rate of adverse events between the two groups.
Conclusion: For patients with acute ST segment elevation MI who underwent emergency PCI, high-dose atorvastatin could provide better performance than moderate-dose in our long-term tracking.