Management of Acute Gastrointestinal Bleeding with Hypotension

Initial Assessment and Resuscitation

For patients with acute gastrointestinal bleeding and hypotension, immediate hemodynamic assessment using shock index (heart rate/systolic BP) should be performed, with aggressive fluid resuscitation, followed by CT angiography for bleeding localization, and prompt intervention based on the source of bleeding 1
Immediately assess hemodynamic status using shock index (heart rate/systolic BP), with a shock index >1 indicating instability requiring urgent intervention 1
For patients requiring blood transfusion, use restrictive transfusion thresholds (Hb trigger 70 g/L, target 70-90 g/L) for patients without cardiovascular disease 1
For patients requiring blood transfusion, use higher threshold (Hb trigger 80 g/L, target ≥100 g/L) for patients with cardiovascular disease 1

For hemodynamically unstable patients (shock index >1), perform CT angiography immediately to localize bleeding before any intervention 1
Following positive CTA, proceed to catheter angiography with embolization within 60 minutes for hemodynamically unstable patients in centers with 24/7 interventional radiology 1
Always consider an upper GI source in patients with hemodynamic instability, as failure to do so can lead to delayed diagnosis and treatment 1
Digital rectal examination should be performed as part of the initial assessment to evaluate for anorectal causes of bleeding 2

For patients on warfarin with unstable GI hemorrhage, interrupt warfarin therapy immediately at presentation 1
For patients on warfarin with unstable GI hemorrhage, reverse anticoagulation with prothrombin complex concentrate and vitamin K 1
For patients with low thrombotic risk, restart warfarin 7 days after hemorrhage 1, 3
For patients with high thrombotic risk, consider low molecular weight heparin therapy at 48 hours after hemorrhage 3

For patients on aspirin for primary prophylaxis, aspirin should be permanently discontinued 3, 1
For patients on aspirin for secondary prevention, aspirin should not be routinely stopped; if stopped, restart as soon as hemostasis is achieved 3, 1
For patients on dual antiplatelet therapy, if P2Y12 receptor antagonist is stopped, it should be reinstated within 5 days to prevent thrombotic complications 3

Mortality in GI bleeding is generally related to comorbidity rather than exsanguination, with in-hospital mortality of 3.4% overall but rising to 18% for inpatient-onset LGIB and 20% for patients requiring ≥4 units of red cells 1