Management of Unfractionated Heparin in Upper Gastrointestinal Bleeding

Initial Management of Anticoagulation in GI Bleeding

The American Gastroenterological Association recommends that unfractionated heparin should be discontinued immediately due to its short half-life, and in cases of severe life-threatening hemorrhage, its effects should be reversed with protamine sulfate 1
Unfractionated heparin has a short half-life, making discontinuation of the drug usually adequate to manage bleeding risk 1
In severe life-threatening upper GI hemorrhage, the anticoagulant effects of unfractionated heparin can be reversed with protamine sulfate 1

For patients with high thrombotic risk, such as those with a prosthetic metal heart valve in mitral position, atrial fibrillation with prosthetic heart valve or mitral stenosis, or less than 3 months after venous thromboembolism, low molecular weight heparin therapy should be considered at 48 hours after hemorrhage has been controlled, as recommended by the American College of Cardiology 2, 3
The decision to restart anticoagulation must balance the risk of thromboembolism against the risk of recurrent bleeding, with a strength of evidence based on high-quality studies 1

Restrictive red blood cell transfusion thresholds, with a hemoglobin trigger of 70 g/L and target of 70-90 g/L, should be used in clinically stable patients, according to the American Association for the Study of Liver Diseases 4
For patients with cardiovascular disease, a higher threshold, with a hemoglobin trigger of 80 g/L and target of 100 g/L, is recommended by the American Heart Association 4

In patients with low thrombotic risk, anticoagulation should be restarted 7 days after hemorrhage has stopped, as recommended by the American College of Gastroenterology 3
For high thrombotic risk patients, earlier reintroduction with low molecular weight heparin, at 48 hours after hemostasis, is recommended by the European Society of Cardiology 3, 5

Failing to reverse unfractionated heparin with protamine sulfate in life-threatening hemorrhage can result in increased morbidity and mortality, with a high strength of evidence 1
Restarting anticoagulation too early, before 48 hours in high-risk patients or before 7 days in low-risk patients, can result in a twofold increase in rebleeding, according to the American Gastroenterological Association 3