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and objectives: According to the recommendations of the latest clinical practice guidelines, non-ST-elevation acute myocardial infarction (NSTEMI) patients should undergo an invasive coronary angiography. However, the best moment to perform this coronary angiography has not been stablished yet. Our main objective was to see if performing an early angiography (within the first 24 h) in NSTEMI patients was associated with better prognosis compared to delayed angiography (beyond the first 24 h). Methods: From January 2014 to June 2016, 447 consecutive patients were admitted to the acute cardiac care unit of a tertiary hospital with a diagnosis of NSTEMI. They all underwent catheterization. We classified them into 3 groups depending on the moment when the coronary angiography was performed (within the first 24 h after diagnosis, 24 h to 72 h later, and > 72 h after diagnosis). Results: Coronary angiography was performed within the first 24 h in 285 patients (63.8%). There were no differences among the groups regarding gender, distribution of cardiovascular risk factors, past medical history of coronary disease or presence of other comorbidities. We found no differences among the 3 groups in variables with known prognostic impact. The cardiovascular events and 1-year mortality at follow-up were similar among the 3 groups. Conclusions: In our study, in the whole spectrum of NSTEMI, early coronary angiography (within the first 24 h) did not show any clinical benefits regarding survival or fewer major adverse cardiovascular events.

Impacto pron�stico de la realizaci�n de una coronariograf�a precoz en pacientes con infarto de miocardio sin elevaci�n del segmento ST