P823Clinical benefits of high dose statins according to the atherothrombotic risk stratification after acute myocardial infarction. The FAST-MI registries
Authors: Puymirat E , Tea V , Schiele F , Baixas C , Lamit X , Karsenty B , Demicheli T , Ferriere J , Simon T , Danchin N 
Published: October 2019

Background

High dose statins prescription are strongly recommended in patients after acute myocardial infarction (AMI) in current guidelines.

Aim

We aimed to assess the clinical impact on major cardiovascular events (MACE) of high dose statins prescription at discharge according to the atherothrombotic risk stratification in a routine-practice population of AMI patients, and to determine the relative efficacy of currently recommended high dose statins according to risk level.

Methods

We used data from the 2005, and 2010 FAST-MI nationwide registries, including 7,839 patients with AMI (54% STEMI) admitted to cardiac intensive care units in France. Atherothrombotic risk stratification was performed using the TIMI Risk Score for Secondary Prevention (TRS-2P). Patients were defined in 3 categories: Group 1 (Low-risk; TRS-2P=0/1); Group 2 (Intermediate-risk; TRS-2P=2); and, Group 3 (High-risk; TRS-2P≥3). Baseline characteristics and the rate of MACE (defined as death, stroke or re-MI) at 5-years were analyzed according to TRS-2P categories, and the impact of high dose statins (i.e. atorvastatin 80mg/day or rosuvastatin 20mg/day) at discharge was compared using Cox multivariate analysis among the different risk groups.

Results

A total of 7,348 patients discharge alive and in whom TRS-2P was available. Prevalence of Groups 1, 2, and Group 3 was 41.5%, 25% and 33.5% respectively. Over the 5-year period, the overall risk of patients admitted for AMI decreased in Group 3 from 41% to 27% (P<0.001). Optimal medical therapy at discharge (defined by the use of dual antiplatelets therapy, statins for all; and, beta-blocker, ACE-I or ARB when appropriate) was 53% in Group 3, 67% in Group 2, and 80% in Group 1 (P<0.001). High dose statins prescription at discharge was 18.5% (Group 3), 31.3% (Group 2), and 41.3%% (Group 1). High dose statins prescription was associated with lower MACE at five-year in the overall population compared to patients with intermediate/low dose statins or without statin prescription (14.3% vs. 29.6%; Δ absolute risk= 15.3%; HR adjusted on baseline characteristics and management: 0.86, 0.76–0.97, P=0.018). The decrease in MACE at five-year was observed in all TRS-2P categories (Group 1: 8.1% vs. 10.7%, Δ= 2.6%; Group 2: 14.8% vs. 21.6%, Δ= 6.8%; Group 3: 30.8% vs. 51.6%, Δ= 20.8%). Finally, the benefits of high dose statins in low- and intermediate-risk was lower (HR=0.97; 95% CI, 0.74–1.26; P=0.81 and HR=1.06; 95% CI, 0.81–1.38; P=0.81) compared to high-risk patients (HR=0.78; 95% CI, 0.65–0.94; P=0.008).

Five-year events-free survival

Conclusions

High dose statins prescription at discharge after AMI was associated with lower MACE at five-year regardless of the atherothrombotic risk stratification, although the highest absolute reduction was found in the high risk TRS2P class.

Acknowledgement/Funding

The FAST-MI 2010 registry is a registry of the French Society of Cardiology, supported by unrestricted grants from: Merck, the Eli-Lilly-Daiichi-Sanky