Evidence map›Paper›PMID 42207444›Full record

ArticleCardiovascular drugs and therapy2026

Citrated Kaolin Reaction Time on Thromboelastography 6s Identifies Bleeding-Prone Phenotypes in Older Adults with Atrial Fibrillation Receiving Direct Oral Anticoagulant Therapy.

Jin Kyung Hwang, Su Hyun Lee, Sung Joo Cha, Chee Hae Kim, Chang Hoon Lee

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Article in Cardiovascular drugs and therapy, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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1 · What the graph read from it

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4 · The record

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5 · Who and what money

Authors and funding

5 authors.

Jin Kyung HwangDivision of Cardiology, Department of Internal Medicine, Veterans Health Service Medical Center, (05368) #53 Jinhawngdo-ro 61 gil, Gangdong-gu, Seoul, Republic of Korea. dangtong@naver.com.ORCID http://orcid.org/0000-0002-9378-0311
Su Hyun LeeDivision of Cardiology, Department of Internal Medicine, Veterans Health Service Medical Center, (05368) #53 Jinhawngdo-ro 61 gil, Gangdong-gu, Seoul, Republic of Korea.ORCID http://orcid.org/0009-0002-7567-9196
Sung Joo ChaDivision of Cardiology, Department of Internal Medicine, Veterans Health Service Medical Center, (05368) #53 Jinhawngdo-ro 61 gil, Gangdong-gu, Seoul, Republic of Korea.ORCID http://orcid.org/0000-0002-4570-623X
Chee Hae KimDivision of Cardiology, Department of Internal Medicine, Veterans Health Service Medical Center, (05368) #53 Jinhawngdo-ro 61 gil, Gangdong-gu, Seoul, Republic of Korea.ORCID http://orcid.org/0000-0002-7767-9395
Chang Hoon LeeDivision of Cardiology, Department of Internal Medicine, Veterans Health Service Medical Center, (05368) #53 Jinhawngdo-ro 61 gil, Gangdong-gu, Seoul, Republic of Korea.ORCID http://orcid.org/0000-0002-1622-272X

Funding

VHS Medical Center Research Grant from the Republic of Korea VHSMC22027
6 · The paper itself

Abstract

purposeOlder adults with atrial fibrillation (AF) receiving direct oral anticoagulants (DOACs) remain at increased bleeding risk, and conventional clinical scores offer limited predictive value. Thromboelastography (TEG6s) provides point-of-care assessment of global hemostasis; however, its clinical utility remains unclear. This study investigated the association between TEG6s parameters and bleeding events in older adults with AF receiving DOAC therapy.

methodsWe prospectively enrolled 100 patients aged ≥ 75 years with non-valvular AF receiving DOAC therapy. Baseline TEG6s parameters, including citrated kaolin reaction time (CKR), were obtained. Bleeding events were classified per International Society on Thrombosis and Haemostasis criteria. Logistic regression and receiver operating characteristic (ROC) analyses identified predictors of clinically relevant bleeding, defined as major and clinically relevant non-major bleeding.

resultsClinically relevant bleeding occurred in 33 patients during a 1-year follow-up. Prolonged CKR was independently associated with increased bleeding risk in multivariate analysis (hazard ratio 1.36; 95% confidence interval: 1.10-1.70; p = 0.005). ROC analysis demonstrated fair discriminative performance for CKR (area under the curve = 0.712), suggesting a potential role as a biomarker for bleeding risk stratification. Other TEG parameters and conventional clinical risk scores were not significant predictors.

conclusionProlonged CKR was significantly associated with clinically relevant bleeding events in older adults with AF receiving DOAC therapy. CKR may reflect an underlying bleeding tendency and could serve as an investigational biomarker for bleeding risk stratification. However, its clinical utility requires confirmation in larger, multicenter studies.

Indexed as

AnticoagulantsAtrial FibrillationFactor Xa InhibitorsHemorrhageKaolinThrombelastographyAdministration, OralAgedAged, 80 and overFemaleHumansMalePhenotypePredictive Value of TestsProspective StudiesRisk FactorsAnticoagulantsFactor Xa InhibitorsKaolinAtrial FibrillationBleedingDirect Oral AnticoagulantsR-TimeThromboelastography

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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.