Coronary angiography as part of the management of non-ST-segment-elevation acute coronary syndrome (ACS) patients has several advantages but also carries some risks if done routinely. The advantage of a planned early invasive approach in moderate to high-risk patients appears to be clear and is recommended by guidelines. This is often not mirrored by real world practice; however, only about 50% to 70% of ACS patients do undergo a diagnostic catheterization. In addition, the optimal timing of an angiography or intervention in relation to contemporary antithrombotic regimens remains unclear. In this paper, the current evidence for routine invasive management as well as the timing of catheterization in non-ST-ACS is reviewed.
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