Comparing physicians and experienced advanced practice practitioners on the interpretation of electrocardiograms in the emergency department

Does Inclusion of Emergency Medicine (EM) Residents in ECG Screening for STEMI Change the Time to Catheterization Lab Activation?

BACKGROUND

Emergency medicine physicians must rapidly obtain and interpret an electrocardiogram (ECG) to quickly identify life-threatening cardiac emergencies such as ST-elevation myocardial infarction (STEMI). Although ECG interpretation is a critical component of residency education, few high-powered studies exploring the accuracy of resident ECG interpretation exist.

OBJECTIVES

This study aims to evaluate whether or not the inclusion of Third Year Emergency Medicine Resident ECG interpretations is noninferior to attending-only ECG interpretations in regard to time to STEMI activation.

METHODS

This was a retrospective noninferiority study of STEMI activation times before and after the inclusion of Third Year Emergency Medicine Resident resident ECG interpretations into the workflow at an academic, urban tertiary care center between November 2020 and April 2022, excluding prehospital activations. The primary outcome was the proportion of successful STEMI activations initiated within 5 minutes of ECG completion. An absolute decrease of 10% between groups was chosen as the noninferiority margin.

RESULTS

In the attending-only group, 26 (66.7%) cases resulted in successful STEMI activations compared to 31 cases (77.5%) in the combined group. The proportion of successful STEMI activations did not differ with resident screening, X 2 = 1.15, P = 0.28. The absolute difference between groups' successful activations was an increase of 11%, which lies within the noninferiority margin (+11%, 95% confidence interval, -8.68% to 30.7%). Average times to STEMI activation in the attending-only and combined groups were 7.59 minutes (Standard Deviation [SD], 10.19) and 5.13 minutes (SD, 6.95), respectively. Average door-to-balloon times for those undergoing Percutaneous Coronary Intervention were 72.74 minutes (SD, 20.76) in the attending-only group and 89.90 minutes (SD, 67.74) in the combination group. Two sample t-test showed no statistically significant difference between the 2 groups for average time to STEMI activation (difference = 2.46 minutes, 95% CI, -1.46 to 6.38) and average door-to-balloon time (difference = 17.16, 95% CI, -39.73 to 5.41).

CONCLUSION

The inclusion of emergency medicine PGY-3 residents in the ECG screening workflow is noninferior to attending-only interpretation of ECGs with regard to STEMI activation time.

Can triage nurses accurately interpret the electrocardiogram in the emergency department to predict acute cardiovascular events? A prospective observational study

AIMS

The prompt recording of the electrocardiogram (ECG) and its correct interpretation is crucial to the management of patients who present to the emergency department (ED) with cardiovascular symptoms. Since triage nurses represent the first healthcare professionals evaluating the patient, improving their ability in interpreting the ECG could have a positive impact on clinical management. This real-world study investigates whether triage nurses can accurately interpret the ECG in patients presenting with cardiovascular symptoms.

DESIGN

Prospective, single-centre observational study conducted in a general ED of General Hospital of Merano in Italy.

METHODS

For all patients included, the triage nurses and the emergency physicians were asked to independently interpret and classify the ECGs answering to dichotomous questions. We correlated the interpretation of the ECG made by the triage nurses with the occurrence of acute cardiovascular events. The inter-rater agreement in ECG interpretation between physicians and triage nurses was evaluated with Cohen's kappa analysis.

RESULTS

Four hundred and ninety-one patients were included. The inter-rater agreement between triage nurses and physicians in classifying an ECG as abnormal was good. Patients who developed an acute cardiovascular event were 10.6% (52/491), and in 84.6% (44/52) of them, the nurse accurately classified the ECG as abnormal, with a sensitivity of 84.6% and a specificity of 43.5%.

CONCLUSION

Triage nurses have a moderate ability in identifying alterations in specific components of the ECG but a good ability in identifying patterns indicative of time-dependent conditions correlated with major acute cardiovascular events.

IMPACT FOR NURSING

Triage nurses can accurately interpret the ECG in the ED to identify patients at high risk of acute cardiovascular events.

REPORTING METHOD

The study was reported according to the STROBE guidelines.

NO PATIENT OR PUBLIC CONTRIBUTION

The study did not involve any patients during its conduction.