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Updated: Jan 16, 2026

Utilizing Percutaneous Ventricular Assist Devices in Acute Myocardial Infarction Complicated by Cardiogenic Shock
Published on: June 12, 2021
Prehospital Vital Signs, Including SpO2, Are Significantly Associated With Mortality and Mechanical Circulatory
Tairo Kurita1, Yumi Hirota2, Hiroki Mori1
1Department of Cardiology and Nephrology, Mie University Graduate School of Medicine.
Background:
Early risk stratification for acute myocardial infarction (AMI) using prehospital vital signs, including percutaneous oxygen before oxygen supply (pre-SpO2), remains underexplored.
Methods And Results:
We analyzed 3,006 AMI patients from the Mie ACS Registry. Patients were stratified by the prehospital Simple Risk Index (pre-SRI = [heart rate × (age / 10)2] / systolic blood pressure) and pre-SpO2levels. The primary outcome was 30-day death. Combined assessment of pre-SRI and pre-SpO2was superior to individual parameters for predicting 30-day death. In the multivariate analysis, combined assessment (SRI ≥34 and SpO2≤94%) was the strongest independent predictors of 30-day death (hazard ratio 3.98, P<0.001).
Conclusions:
Prehospital vital signs including pre-SpO2enable early high-risk identification, improving clinical decision-making for hospital selection.
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