Prehospital risk stratification using a modified thrombolysis in myocardial infarction (PRISM TIMI) score: a retrospective medical record review
Reed, Ashley
Reed, Ashley
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Abstract
Background Paramedics convey patients with non-ST elevation
acute coronary syndrome (NSTEACS) to emergency departments (EDs). The patient should be risk stratified using a risk
stratification model (RSM) in the ED to determine the risk of
death or adverse cardiovascular events. This determines if the
patient should be transferred to a specialist heart attack centre
(HAC) for an invasive procedure. If paramedics were to risk
stratify the patients in the prehospital environment using a
Modified Thrombolysis in Myocardial Infarction (MTIMI) RSM
this could result in primary triage to an appropriate hospital.
This could reduce secondary transfers, decrease demand on
EDs, provide better patient care, reduce length of hospital stay
and could provide cost savings to the National Health Service.
Aim To determine if paramedics’ use of a MTIMI RSM is more
accurate than current practice at identifying and risk stratifying
patients suffering from suspected high risk NSTEACS.
Methods A retrospective medical record review.
Results 108 patient notes were used in this study, 84 from the
ED and 24 from the HAC. Current practice produced a
c-statistic (c) of 0.73 (95% Confidence Interval (CI) 0.62 to
0.85) and the MTIMI RSM (c=0.72, 0.61 to 0.83). The best
RSM overall was the abbreviated MTIMI RSM with only three
variables identified through logistic regression [diabetes mellitus,
over 65 years and the electrocardiogram (ECG)] (c=0.79, 0.68
to 0.89).
Conclusions The main reason that current practice was similar
to the MTIMI RSM was that they both used the ECG variable,
which alone was approximately twelve times more prognostic
than any other variable. The need to identify a RSM with a
good prognostic power that can be used in the prehospital
environment still exists. Therefore, other RSMs should be
explored in a prospective study
https://emj.bmj.com/content/emermed/33/9/e2.2.full.pdf
This is an Open Access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/
http://dx.doi.org/10.1136/emermed-2016-206139.9