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Chronic nitrate therapy is associated with different presentation and evolution of acute coronary syndromes: insights
Giuseppe Ambrosio1, Maurizio Del Pinto, Isabella Tritto
1Division of Cardiology, University of Perugia School of Medicine, Perugia, Italy. giuseppe.ambrosio@ospedale.perugia.it
Chronic nitrate use may protect the heart by reducing the severity of acute coronary events, shifting presentation from ST-segment elevation myocardial infarction (STEMI) to non-ST-segment elevation acute coronary syndrome (NSTE-ACS). Further trials are needed to confirm this protective effect.
Area of Science:
- Cardiology
- Pharmacology
Background:
- Ischaemic preconditioning enhances cardiac tolerance to subsequent ischaemia.
- Nitrates can mimic ischaemic preconditioning in animal models.
Purpose of the Study:
- To investigate if antecedent nitrate therapy protects against acute ischaemic events.
- Utilized data from the Global Registry of Acute Coronary Events.
Main Methods:
- Analyzed data from 52,693 patients across 123 centers in 14 countries.
- Compared outcomes between patients on chronic nitrates and nitrate-naïve patients.
- Adjusted for various clinical factors including age, sex, and medical history.
Main Results:
- Chronic nitrate users showed a four-fold shift towards non-ST-segment elevation acute coronary syndrome (NSTE-ACS) compared to ST-segment elevation myocardial infarction (STEMI).
- Nitrate use was an independent predictor of NSTE-ACS.
- Nitrate users exhibited significantly lower cardiac necrosis markers (CK-MB, troponin).
Conclusions:
- Chronic nitrate use is associated with a less severe presentation of acute coronary events.
- Findings suggest nitrates may offer pharmacological preconditioning benefits.
- Randomized trials are recommended to confirm nitrate therapy's protective role.
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