Evidence map›Paper›PMID 27692949›Full record

ArticleThe Journal of thoracic and cardiovascular surgery2016

Does moderate hypothermia really carry less bleeding risk than deep hypothermia for circulatory arrest? A propensity-matched comparison in hemiarch replacement.

Jeffrey E Keenan, Hanghang Wang, Brian C Gulack, Asvin M Ganapathi, Nicholas D Andersen, Brian R Englum, Yamini Krishnamurthy, Jerrold H Levy, Ian J Welsby, G Chad Hughes

Open access · bronzeAbstract read
In one paragraph

Article in The Journal of thoracic and cardiovascular surgery, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed, 1 pooled it
2.3field-weighted citation impact, top 12% of its field
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

24 citing papers in PubMed, 1 synthesis or guideline pooled it, 56 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Cerebral and Spinal Cord Protection Strategies in Aortic Arch Surgery.Journal of cardiovascular development and disease · 2025
    Review
  5. Article
  6. Hypothermic circulatory arrest at 20 ℃ does not deteriorate coagulopathy compared to 28 ℃ in a pig model.Journal of artificial organs : the official journal of the Japanese Society for Artificial Organs · 2025
    Article
  7. Article
  8. Short-term outcomes of mild (≥30 ℃)Journal of thoracic disease · 2024
    Article
  9. Hypothermic circulatory arrest does not induce coagulopathy in vitro.Journal of artificial organs : the official journal of the Japanese Society for Artificial Organs · 2022
    Article
  10. Article
  11. Article
  12. Article
  13. Article
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  17. Observational
  18. Aortic valve repair with a newly approved geometric annuloplasty ring in patients undergoing proximal aortic repair: early results from a single-centre experience.European journal of cardio-thoracic surgery : official journal of the European Association for Cardio-thoracic Surgery · 2020
    Article
  19. Article
  20. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

10 authors at 2 institutions in 1 country.

Jeffrey E KeenanDivision of Cardiovascular and Thoracic Surgery, Department of Surgery, Duke University Medical Center, Durham, NC.
Hanghang WangDivision of Cardiovascular and Thoracic Surgery, Department of Surgery, Duke University Medical Center, Durham, NC; Department of Anesthesiology, Duke University Medical Center, Durham, NC.
Brian C GulackDivision of Cardiovascular and Thoracic Surgery, Department of Surgery, Duke University Medical Center, Durham, NC.
Asvin M GanapathiDivision of Cardiovascular and Thoracic Surgery, Department of Surgery, Duke University Medical Center, Durham, NC.
Nicholas D AndersenDivision of Cardiovascular and Thoracic Surgery, Department of Surgery, Duke University Medical Center, Durham, NC.
Brian R EnglumDivision of Cardiovascular and Thoracic Surgery, Department of Surgery, Duke University Medical Center, Durham, NC.
Yamini KrishnamurthySchool of Medicine, Duke University Medical Center, Durham, NC.
Jerrold H LevyDepartment of Anesthesiology, Duke University Medical Center, Durham, NC.
Ian J WelsbyDepartment of Anesthesiology, Duke University Medical Center, Durham, NC.
G Chad HughesDivision of Cardiovascular and Thoracic Surgery, Department of Surgery, Duke University Medical Center, Durham, NC. Electronic address: gchad.hughes@duke.edu.
Duke Medical Center · USDuke University Hospital · US

Funding

Cardiothoracic Surgical Network Clinical CenterU01HL088953 · NHLBI · DUKE UNIVERSITY · PI SMITH, PETER K · 2007 to 2013
$2.6M
Core Clinical Centers for the CTSNUM1HL088953 · NHLBI · DUKE UNIVERSITY · PI SMITH, PETER K · 2013 to 2017
$2.5M
NHLBI NIH HHS U01 HL088953NHLBI NIH HHS UM1 HL088953
6 · The paper itself

Abstract

backgroundModerate (MHCA) versus deep (DHCA) hypothermia for circulatory arrest in aortic arch surgery has been purported to reduce coagulopathy and bleeding complications, although there are limited data supporting this claim. This study aimed to compare bleeding-related events after aortic hemiarch replacement with MHCA versus DHCA.

methodsPatients who underwent hemiarch replacement at a single institution from July 2005 to August 2014 were stratified into DHCA and MHCA groups (minimum systemic temperature ≤20°C and >20°C, respectively) and compared. Then, 1:1 propensity matching was performed to adjust for baseline differences.

resultsDuring the study period, 571 patients underwent hemiarch replacement: 401 (70.2%) with DHCA and 170 (29.8%) with MHCA. After propensity matching, 155 patients remained in each group. There were no significant differences between matched groups with regard to the proportion transfused with red blood cells, plasma, platelet concentrates, or cryoprecipitate on the operative day, the rate of reoperation for bleeding, or postoperative hematologic laboratory values. Among patients who received plasma, the median transfusion volume was statistically greater in the DHCA group (6 vs 5 units, P = .01). MHCA also resulted in a slight reduction in median volume of blood returned via cell saver (500 vs 472 mL, P < .01) and 12-hour postoperative chest tube output (440 vs 350, P < .01). Thirty-day mortality and morbidity did not differ significantly between groups.

conclusionsMHCA compared with DHCA during hermiarch replacement may slightly reduce perioperative blood-loss and plasma transfusion requirement, although these differences do not translate into reduced reoperation for bleeding or postoperative mortality and morbidity.

Indexed as

Heart Valve Prosthesis ImplantationAgedAorta, ThoracicBlood Loss, SurgicalCirculatory Arrest, Deep Hypothermia InducedFemaleHemorrhageHumansHypothermia, InducedMaleMiddle AgedPropensity ScoreRetrospective StudiesTreatment Outcomeaortic arch surgerycirculatory arrestcoagulopathydeep hypothermiahemiarch replacementmoderate hypothermiatransfusion

Identifiers

PMID27692949
PMCPMC5154360
OpenAlexW2512331879

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

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.