Is point-of-care ultrasound a reliable predictor of outcome during atraumatic, non-shockable cardiac arrest? A systematic review and meta-analysis from the SHoC investigators

Resuscitation. 2019 Jun;139:159-166. doi: 10.1016/j.resuscitation.2019.03.027. Epub 2019 Apr 9.

Abstract

Aims: To evaluate the accuracy of PoCUS in predicting return of spontaneous circulation (ROSC), survival to hospital admission (SHA), and survival to hospital discharge (SHD) in adult non-traumatic, non-shockable out-of-hospital or emergency department cardiac arrest.

Methods: Medline, EMBASE, Cochrane, CINAHL, ClinicalTrials.gov and the World Health Organization Registry were searched for eligible studies. Data analysis was completed according to PRISMA guidelines. A random-effects meta-analysis model was used with I-squared statistics for heterogeneity.

Results: Ten studies (1486 participants) were included. Cardiac activity on PoCUS had a pooled sensitivity of 60.3% (95% confidence interval 38.1%-78.9%) and specificity of 91.5%(80.8%-96.5%) for ROSC. The sensitivity of cardiac activity on PoCUS for predicting ROSC was 26.1%(7.8%-59.6%) in asystole compared with 76.7% (61.3%-87.2%) in PEA. Cardiac activity on PoCUS, compared to absence, had odd ratios of 16.90 (6.18-46.21) for ROSC, 10.30(5.32-19.98) for SHA and 8.03(3.01-21.39) for SHD. Positive likelihood ratio (LR) was 6.87(3.21-14.71) and negative LR was 0.27(0.12-0.60) for ROSC.

Conclusions: Cardiac activity on PoCUS was associated with improved odds for ROSC, SHA, and SHD in non-traumatic, non-shockable cardiac arrest. We report a lower sensitivity and higher negative likelihood ratio, but greater heterogeneity compared to previous systematic reviews. PoCUS may provide valuable information in the management of non-traumatic PEA or asystole, but should not be viewed as the sole predictor in determining outcomes.

Keywords: Cardiac arrest; Focused echocardiography; Point-of-care ultrasound; Prognosis.

Publication types

  • Meta-Analysis
  • Systematic Review

MeSH terms

  • Adult
  • Aged
  • Aged, 80 and over
  • Cardiopulmonary Resuscitation / mortality
  • Female
  • Humans
  • Male
  • Middle Aged
  • Out-of-Hospital Cardiac Arrest / diagnostic imaging*
  • Out-of-Hospital Cardiac Arrest / mortality
  • Point-of-Care Systems / standards*
  • Predictive Value of Tests
  • Ultrasonography*