• Gabriele Martelli, Sabrina Congedi, Giulia Lorenzoni, Marco Nardelli, Vittorio Lucchetta, Dario Gregori, and Ivo Tiberio.
• Intensive Care Unit U.O.C. Anestesia e Rianimazione, Department of Surgery, Padua University Hospital, Padua, Italy. Electronic address: gabriele.martelli@aopd.veneto.it.
• J Crit Care. 2023 Aug 1; 76: 154281154281.

BackgroundThe reliability of echocardiographic methods for the assessment of pulmonary capillary wedge pressure (PCWP) is still a matter of debate. Since its first description, the E/e' ratio has been regarded as a suitable method. The aim of this study is to evaluate the evidence of how E/e' effectively estimates PCWP and its diagnostic accuracy for elevated PCWP.MethodsWe systematically searched MEDLINE and Embase databases for studies investigating the agreement between E/e' and PCWP, from inception to July 2022. We limited our research to studies published from 2010 to date. Retrospective studies and studies on non-adult population were excluded.ResultsTwenty-eight studies, involving a total of 1964 subjects, were included. The pooled analysis of the studies showed a modest correlation between E/e' and PCWP. The weighted average correlation (r) is 0.43 (95% CI 0.37-0.48). We found no significant differences between reduced and preserved ejection fraction groups. Thirteen studies analysed the diagnostic accuracy of E/e' for elevated PCWP. The AUC of receiver operating characteristic curves for PCWP >15 mmHg was estimated in the interval 0.6-0.91.DiscussionE/e' appears to have a modest correlation with PCWP and an acceptable accuracy for elevated PCWP. (PROSPERO number, CRD42022333462).Copyright © 2023 Elsevier Inc. All rights reserved.

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