Thromboembolic risks of recombinant factor VIIa Use in warfarin-associated intracranial hemorrhage: a case–control study
<p>Abstract</p> <p>Background</p> <p>Recombinant factor VIIa (rFVIIa) may be used for rapid hemostasis in life-threatening hemorrhage. In warfarin-associated intracerebral hemorrhage (wICH), FVIIa use is controversial and may carry significant thromboembolic risks. We c...
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| Format: | Article |
| Language: | English |
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BMC
2012-12-01
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| Series: | BMC Neurology |
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| Online Access: | http://www.biomedcentral.com/1471-2377/12/158 |
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| author | H-Y Chou Sherry Xuemei Cai G Konigsberg Rachael M Bresette Linda V Henderson Galen A Sorond Farzaneh K Feske Steven |
| author_facet | H-Y Chou Sherry Xuemei Cai G Konigsberg Rachael M Bresette Linda V Henderson Galen A Sorond Farzaneh K Feske Steven |
| author_sort | H-Y Chou Sherry |
| collection | DOAJ |
| description | <p>Abstract</p> <p>Background</p> <p>Recombinant factor VIIa (rFVIIa) may be used for rapid hemostasis in life-threatening hemorrhage. In warfarin-associated intracerebral hemorrhage (wICH), FVIIa use is controversial and may carry significant thromboembolic risks. We compared incidence of baseline thromboembolic risk factors and thromboembolism rates in wICH patients treated with additional rFVIIa to those treated with standard therapy of fresh frozen plasma (FFP) and vitamin K alone.</p> <p>Methods</p> <p>We identified 45 consecutive wICH patients treated with additional rFVIIa over 5-year period, and 34 consecutive wICH patients treated with standard therapy alone as comparison group. We compared the incidence of post-hemorrhage cardiac and extra-cardiac thromboembolic complications between two treatment groups, and used logistic regression to adjust for significant confounders such as baseline thromboembolic risk factors. We performed secondary analysis comparing the quantity of FFP transfused between two treatment cohorts.</p> <p>Results</p> <p>Both rFVIIa-treated and standard therapy-treated wICH patients had a high prevalence of pre-existing thromboembolic diseases including atrial fibrillation (73% vs 68%), deep venous thrombosis (DVT) or pulmonary embolism (PE) (22% vs 18%), coronary artery disease (CAD) (38% vs 32%), and abnormal electrocardiogram (EKG) (78% vs 85%). Troponin elevation following wICH was prevalent in both groups (47% vs 41%). Clinically significant myocardial infarction (MI), defined as troponin > 1.0 ng/dL, occurred in 13% of rFVIIa-treated and 6% of standard therapy-treated patients (p=0.52). Past history of CAD (p=0.0061) and baseline abnormal EKG (p=0.02) were independently associated with clinically significant MI following wICH while rFVIIa use was not. The incidences of DVT/PE (2% vs 9%; p=0.18) and ischemic stroke (2% vs 0%; p=0.38) were similar between two treatment groups. Recombinant FVIIa-treated patients had lower mean INR at 3 (p=0.0001) and 6 hours (p<0.0001) and received fewer units of FFP transfusion (3 vs 5; p=0.003).</p> <p>Conclusions</p> <p>Pre-existing thromboembolic risk factors as well as post-hemorrhage troponin elevation are prevalent in wICH patients. Clinically significant MI occurs in up to 13% of wICH patients. rFVIIa use was not associated with increased incidence of clinically significant MI or other venous or arterial thromboembolic events in this wICH cohort.</p> |
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| format | Article |
| id | doaj.art-2b27fc89f04045069ec2b0366c5c62c9 |
| institution | Directory Open Access Journal |
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| language | English |
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| publishDate | 2012-12-01 |
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| spelling | doaj.art-2b27fc89f04045069ec2b0366c5c62c92022-12-22T00:16:50ZengBMCBMC Neurology1471-23772012-12-0112115810.1186/1471-2377-12-158Thromboembolic risks of recombinant factor VIIa Use in warfarin-associated intracranial hemorrhage: a case–control studyH-Y Chou SherryXuemei CaiG Konigsberg RachaelM Bresette LindaV Henderson GalenA Sorond FarzanehK Feske Steven<p>Abstract</p> <p>Background</p> <p>Recombinant factor VIIa (rFVIIa) may be used for rapid hemostasis in life-threatening hemorrhage. In warfarin-associated intracerebral hemorrhage (wICH), FVIIa use is controversial and may carry significant thromboembolic risks. We compared incidence of baseline thromboembolic risk factors and thromboembolism rates in wICH patients treated with additional rFVIIa to those treated with standard therapy of fresh frozen plasma (FFP) and vitamin K alone.</p> <p>Methods</p> <p>We identified 45 consecutive wICH patients treated with additional rFVIIa over 5-year period, and 34 consecutive wICH patients treated with standard therapy alone as comparison group. We compared the incidence of post-hemorrhage cardiac and extra-cardiac thromboembolic complications between two treatment groups, and used logistic regression to adjust for significant confounders such as baseline thromboembolic risk factors. We performed secondary analysis comparing the quantity of FFP transfused between two treatment cohorts.</p> <p>Results</p> <p>Both rFVIIa-treated and standard therapy-treated wICH patients had a high prevalence of pre-existing thromboembolic diseases including atrial fibrillation (73% vs 68%), deep venous thrombosis (DVT) or pulmonary embolism (PE) (22% vs 18%), coronary artery disease (CAD) (38% vs 32%), and abnormal electrocardiogram (EKG) (78% vs 85%). Troponin elevation following wICH was prevalent in both groups (47% vs 41%). Clinically significant myocardial infarction (MI), defined as troponin > 1.0 ng/dL, occurred in 13% of rFVIIa-treated and 6% of standard therapy-treated patients (p=0.52). Past history of CAD (p=0.0061) and baseline abnormal EKG (p=0.02) were independently associated with clinically significant MI following wICH while rFVIIa use was not. The incidences of DVT/PE (2% vs 9%; p=0.18) and ischemic stroke (2% vs 0%; p=0.38) were similar between two treatment groups. Recombinant FVIIa-treated patients had lower mean INR at 3 (p=0.0001) and 6 hours (p<0.0001) and received fewer units of FFP transfusion (3 vs 5; p=0.003).</p> <p>Conclusions</p> <p>Pre-existing thromboembolic risk factors as well as post-hemorrhage troponin elevation are prevalent in wICH patients. Clinically significant MI occurs in up to 13% of wICH patients. rFVIIa use was not associated with increased incidence of clinically significant MI or other venous or arterial thromboembolic events in this wICH cohort.</p>http://www.biomedcentral.com/1471-2377/12/158Activated recombinant factor VIIIntracerebral hemorrhageThromboembolismWarfarin |
| spellingShingle | H-Y Chou Sherry Xuemei Cai G Konigsberg Rachael M Bresette Linda V Henderson Galen A Sorond Farzaneh K Feske Steven Thromboembolic risks of recombinant factor VIIa Use in warfarin-associated intracranial hemorrhage: a case–control study BMC Neurology Activated recombinant factor VII Intracerebral hemorrhage Thromboembolism Warfarin |
| title | Thromboembolic risks of recombinant factor VIIa Use in warfarin-associated intracranial hemorrhage: a case–control study |
| title_full | Thromboembolic risks of recombinant factor VIIa Use in warfarin-associated intracranial hemorrhage: a case–control study |
| title_fullStr | Thromboembolic risks of recombinant factor VIIa Use in warfarin-associated intracranial hemorrhage: a case–control study |
| title_full_unstemmed | Thromboembolic risks of recombinant factor VIIa Use in warfarin-associated intracranial hemorrhage: a case–control study |
| title_short | Thromboembolic risks of recombinant factor VIIa Use in warfarin-associated intracranial hemorrhage: a case–control study |
| title_sort | thromboembolic risks of recombinant factor viia use in warfarin associated intracranial hemorrhage a case control study |
| topic | Activated recombinant factor VII Intracerebral hemorrhage Thromboembolism Warfarin |
| url | http://www.biomedcentral.com/1471-2377/12/158 |
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