TY  - JOUR
N1  - This version is the author accepted manuscript. For information on re-use, please refer to the publisher?s terms and conditions.
EP  - 1238
KW  - Animal models
KW  -  Aspirin
KW  -  Humans
KW  -  Infarct size
KW  -  Postconditioning
KW  -  Reperfusion injury
KW  -  Statins
KW  -  STEMI
AV  - public
ID  - discovery10145790
SN  - 0920-3206
PB  - Springer Verlag
VL  - 36
JF  - Cardiovascular Drugs and Therapy
UR  - https://doi.org/10.1007/s10557-022-07327-x
A1  - Ye, Regina
A1  - Jneid, Hani
A1  - Alam, Mahboob
A1  - Uretsky, Barry F
A1  - Atar, Dan
A1  - Kitakaze, Masafumi
A1  - Davidson, Sean M
A1  - Yellon, Derek M
A1  - Birnbaum, Yochai
Y1  - 2022/12//
SP  - 1221
N2  - Aspirin loading (chewable or intravenous) as soon as possible after presentation is a class I recommendation by current ST elevation myocardial infarction (STEMI) guidelines. Earlier achievement of therapeutic antiplatelet effects by aspirin loading has long been considered the standard of care. However, the effects of the loading dose of aspirin (alone or in addition to a chronic maintenance oral dose) have not been studied. A large proportion of myocardial cell death occurs upon and after reperfusion (reperfusion injury). Numerous agents and interventions have been shown to limit infarct size in animal models when administered before or immediately after reperfusion. However, these interventions have predominantly failed to show significant protection in clinical studies. In the current review, we raise the hypothesis that aspirin loading may be the culprit. Data obtained from animal models consistently show that statins, ticagrelor, opiates, and ischemic postconditioning limit myocardial infarct size. In most of these studies, aspirin was not administered. However, when aspirin was administered before reperfusion (as is the case in the majority of studies enrolling STEMI patients), the protective effects of statin, ticagrelor, morphine, and ischemic postconditioning were attenuated, which can be plausibly attributable to aspirin loading. We therefore suggest studying the effects of aspirin loading before reperfusion on the infarct size limiting effects of statins, ticagrelor, morphine, and/ or postconditioning in large animal models using long reperfusion periods (at least 24 h). If indeed aspirin attenuates the protective effects, clinical trials should be conducted comparing aspirin loading to alternative antiplatelet regimens without aspirin loading in patients with STEMI undergoing primary percutaneous coronary intervention.
TI  - Do We Really Need Aspirin Loading for STEMI?
ER  -