Evidence map›Paper›PMID 35928751›Full record

ArticleAnnals of translational medicine2022

The role of head-up cardiopulmonary resuscitation in sudden cardiac arrest: a systematic review and meta-analysis.

Ying Kiat Tan, Ming Xuan Han, Benjamin Yong-Qiang Tan, Ching-Hui Sia, Claire Xin Yi Goh, Aloysius Sheng-Ting Leow, Derek J Hausenloy, Edwin Shih Yen Chan, Marcus Eng Hock Ong, Andrew Fu Wah Ho

Abstract read
In one paragraph

Article in Annals of translational medicine, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.

0numbers the graph read from it
0cells of the map it votes in
4citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

4 citing papers in PubMed.

  1. Review
  2. Mechanism of post cardiac arrest syndrome based on animal models of cardiac arrest.Zhong nan da xue xue bao. Yi xue ban = Journal of Central South University. Medical sciences · 2025
    Review
  3. Article
  4. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

10 authors.

Ying Kiat Tan *Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.
Ming Xuan Han *Emergency Medical Services Department, Singapore Civil Defence Force, Ministry of Home Affairs, Singapore, Singapore.
Benjamin Yong-Qiang TanDivision of Neurology, Department of Medicine, National University Health System, Singapore, Singapore.
Ching-Hui SiaYong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.
Claire Xin Yi GohYong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.
Aloysius Sheng-Ting LeowDepartment of Medicine, National University Health System, Singapore, Singapore.
Derek J HausenloyYong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.
Edwin Shih Yen ChanDuke-NUS Graduate Medical School Singapore, Singapore, Singapore.
Marcus Eng Hock OngDepartment of Emergency Medicine, Singapore General Hospital, Singapore, Singapore.
Andrew Fu Wah HoDepartment of Emergency Medicine, Singapore General Hospital, Singapore, Singapore.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Background: Head-up cardiopulmonary resuscitation (HU-CPR) is an experimental treatment for sudden cardiac arrest (SCA), where cardiopulmonary resuscitation (CPR) is performed in a ramped position. We evaluated whether HU-CPR improved survival and surrogate outcomes as compared to standard CPR (S-CPR). Methods: Studies reporting on HU-CPR in SCA were searched for in PubMed, Embase and Cochrane Library from inception to May 1st 2021. Outcomes included neurologically-intact survival, 24-hour-survival, intracranial pressure (ICP), cerebral perfusion pressure (CerPP) and brain blood flow (BBF). Risk of bias was assessed using the GRADE assessment tool and Newcastle Ottawa Scale. Fixed- and random-effects models were used to estimate the pooled effects of HU-CPR at 30 degrees. Results: Thirteen articles met the criteria for inclusion (11 animal-only studies, one before-and-after human-only study, one study that utilized human- and animal-cadavers). Among animal studies, the most common implementation of HU-CPR was a 30-degree upward tilt of the head and thorax (n=7), while four studies investigated controlled sequential elevation (CSE). Two animal studies reported improved cerebral performance category (CPC) scores at 24-hour. The pooled effect on 24-hour survival was not statistically significant (P=0.37). The lone human study reported doubled return of spontaneous circulation (ROSC) (17.9% versus 34.2%, P<0.0001). The pooled effect on ROSC in three porcine studies was OR =3.63 (95% CI: 0.72-18.39). Pooled effects for surrogate physiological outcomes of intracranial cranial pressure (MD -14.08, 95% CI: -23.21 to -4.95, P=0.003), CerPP (MD 14.39, 95% CI: 3.07-25.72, P=0.01) and BBF (MD 0.14, 95% CI: 0.02-0.27, P=0.03), showed statistically significant benefit. Discussion: Overall, HU-CPR improved neurologically-intact survival at 24-hour, ROSC and physiological surrogate outcomes in animal models. Despite promising preclinical data, and one human observational study, clinical equipoise remains surrounding the role of HU-CPR in SCA, necessitating clarification with future randomized human trials.

Indexed as

basic life supportCardiac arrestcardiopulmonary resuscitation (CPR)resuscitation

Identifiers

PMID35928751
PMCPMC9347036

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LicenceCC BY-NC-ND
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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.