ArticleInterdisciplinary cardiovascular and thoracic surgery2024
Suspected heparin-induced thrombocytopaenia in pulmonary thromboendarterectomy: retrospective cohort.
Article in Interdisciplinary cardiovascular and thoracic surgery, 2024. 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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Abstract
objectivesHeparin is given for anticoagulation during and after pulmonary thromboendarterectomy for chronic thromboembolic pulmonary hypertension. Our objective was to add to the limited data available on the incidence, management and outcomes of suspected heparin-induced thrombocytopaenia after pulmonary thromboendarterectomy for chronic thromboembolic pulmonary hypertension.
methodsThis retrospective single-centre study included consecutive patients with suspected heparin-induced thrombocytopaenia after pulmonary thromboendarterectomy done in 2005-2018. Confirmed heparin-induced thrombocytopaenia was defined as positive findings from both the antibody test and the platelet aggregation test. Patients with versus without confirmed heparin-induced thrombocytopaenia were compared, as well as patients with versus without heparin replacement therapy within the group with unconfirmed heparin-induced thrombocytopaenia. The platelet counts over time were compared to those in controls without suspected heparin-induced thrombocytopaenia.
resultsHeparin-induced thrombocytopaenia was suspected in 86 (6.3%) of 1360 patients and confirmed in 16 (16/86, 19%), all of whom received heparin replacement therapy and survived to intensive care unit discharge. Of the remaining 70 patients, 28 (40%) received heparin replacement therapy and less often experienced bleeding compared to the other 42 (3.6% vs 21.4%, P = 0.043). Intensive care unit mortality was 17/70 (24.3%) and was lower in the subgroup given heparin replacement therapy (10.7% vs 33.3%; P = 0.046). Confirmed heparin-induced thrombocytopaenia was associated with a sharp platelet-count drop on Day 5. In unconfirmed suspected heparin-induced thrombocytopaenia, the early platelet-count decline was similar to that in the controls without suspected heparin-induced thrombocytopaenia, but the baseline count was lower.
conclusionsClinical features suggesting heparin-induced thrombocytopaenia after pulmonary thromboendarterectomy for chronic thromboembolic pulmonary hypertension were associated with excess mortality. Relay heparin replacement therapy was associated with lower mortality and fewer bleeding events.
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