UMass Chan Medical School Faculty Publications

Title

Comparison of outcomes between pulseless electrical activity by electrocardiography and pulseless myocardial activity by echocardiography in out-of-hospital cardiac arrest; secondary analysis from a large, prospective study

UMMS Affiliation

Department of Emergency Medicine

Publication Date

2021-11-16

Document Type

Article

Disciplines

Analytical, Diagnostic and Therapeutic Techniques and Equipment | Cardiology | Cardiovascular Diseases | Emergency Medicine

Abstract

OBJECTIVE: To measure prevalence of discordance between electrical activity recorded by electrocardiography (ECG) and myocardial activity visualized by echocardiography (echo) in patients presenting after cardiac arrest and to compare survival outcomes in cohorts defined by ECG and echo.

METHODS: This is a secondary analysis of a previously published prospective study at twenty hospitals. Patients presenting after out-of-hospital arrest were included. The cardiac electrical activity was defined by ECG and contemporaneous myocardial activity was defined by bedside echo. Myocardial activity by echo was classified as myocardial asystole--the absence of myocardial movement, pulseless myocardial activity (PMA)--visible myocardial movement but no pulse, and myocardial fibrillation--visualized fibrillation. Primary outcome was the prevalence of discordance between electrical activity and myocardial activity.

RESULTS: 793 patients and 1943 pauses in CPR were included. 28.6% of CPR pauses demonstrated a difference in electrical activity (ECG) and myocardial activity (echo), 5.0% with asystole (ECG) and PMA (echo), and 22.1% with PEA (ECG) and myocardial asystole (echo). Twenty-five percent of the 32 pauses in CPR with a shockable rhythm by echo demonstrated a non-shockable rhythm by ECG and were not defibrillated. Survival for patients with PMA (echo) was 29.1% (95%CI-23.9-34.9) compared to those with PEA (ECG) (21.4%, 95%CI-17.7-25.6).

CONCLUSION: Patients in cardiac arrest commonly demonstrate different electrical (ECG) and myocardial activity (echo). Further research is needed to better define cardiac activity during cardiac arrest and to explore outcome between groups defined by electrical and myocardial activity.

Keywords

ACLS, Advanced Cardiac Life Support, Asystole, Cardiac arrest, ECG, Echo, Echocardiography, Electrocardiography, Myocardial asystole, PEA, Pulseless electrical activity, Pulseless myocardial activity, Ultrasound, Ventricular fibrillation

DOI of Published Version

10.1016/j.resuscitation.2021.09.010

Source

Gaspari R, Weekes A, Adhikari S, Noble VE, Nomura JT, Theodoro D, Woo MY, Atkinson P, Blehar D, Brown SM, Caffery T, Haines C, Lam S, Lanspa M, Lewis M, Liebmann O, Limkakeng A, Platz E, Moore C, Raio C. Comparison of outcomes between pulseless electrical activity by electrocardiography and pulseless myocardial activity by echocardiography in out-of-hospital cardiac arrest; secondary analysis from a large, prospective study. Resuscitation. 2021 Dec;169:167-172. doi: 10.1016/j.resuscitation.2021.09.010. Epub 2021 Nov 16. PMID: 34798178. Link to article on publisher's site

Comments

Full author list omitted for brevity. For the full list of authors, see article.

Related Resources

Link to Article in PubMed

Journal/Book/Conference Title

Resuscitation

PubMed ID

34798178

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