Case Report: The aslanger pattern as an indicator of severe acute coronary syndrome.

Current guidelines categorize acute coronary syndrome (ACS) into unstable angina, ST-segment elevation myocardial infarction (STEMI), and non-ST-segment elevation myocardial infarction (NSTEMI). However, this categorization paradigm can lead to the underrecognition of acute coronary occlusion (ACO), especially when electrocardiographic findings are atypical. The Aslanger pattern is a critical ECG signature characterized by isolated ST-segment elevation in lead III with concomitant ST depression in leads V4-V6. It is often associated with severe multivessel disease, poor prognosis, and high mortality. We present two cases of chest pain with ECGs consistent with the Aslanger pattern. Coronary angiography confirmed three-vessel disease, with ACO in at least one vessel and severe stenosis in another. Notably, Patient 1 suffered in-hospital mortality, while Patient 2 had an uneventful recovery, underscoring the impact of timely intervention. This report emphasizes the value of recognizing the Aslanger pattern to bridge a diagnostic gap in ACS, enabling early identification of ACO, prompt reperfusion therapy, and ultimately, improved patient outcomes.