ACG Releases Guidance on Anticoagulant, Antiplatelet Therapy During Gastrointestinal Bleeding

This article was originally published on HCPLive.com.

The American College of Gastroenterology has released new guidance related to the use of antithrombotic therapy during acute gastrointestinal bleeding episodes or elective endoscopic settings.

Released on March 17, the guidelines were composed by a guideline writing committee led by Neena Abraham, MD, MSc, and provide new evidence-based recommendations for use of multiple antithrombotic agents, including direct oral anticoagulants, P2Y12 inhibitors, and vitamin K antagonists.

The Treatments

There are several classes of drugs including antithrombotic drugs, director anticoagulants (DOACs), antiplatelet drugs, and acetylsalicylic acid (ASA) used to treat patients with atrial fibrillation, ischemic heart disease, venous thromboembolism, and valvular heart disease that also increase the risk of gastrointestinal bleeding from luminal sources, including ulcers or diverticular and following endoscopic procedures.

After reviewing predefined clinical questions, the investigators formed by the American College of Gastroenterology (ACG) and the Canadian Association of Gastroenterology (CAG) developed the new guidelines using the Grading of Recommendations, Assessment, Development, and Evaluations approach.

Patients With Gastrointestinal Bleeding

The new guidance includes no longer using freshfrozen plasma or vitamin K for patients on warfarin, in favor of prothrombin complex concentrate (PCC).

For patients on dabigatran, the investigators suggest against the administration of idarucizumab, while patients on rivaroxaban or apixaban no longer are recommended to be treated with andexant alfa administration.

In addition, patients on cardiac acetylsalicylic acid for secondary prevention, the investigators suggest against holding it. However, if the ASA is interrupted, the new guidelines call for the resumption on the data hemostatis is endoscopically confirmed.

Elective Endoscopy

There also are a number of recommendations for patients in the elective endoscopy setting.

For example, patients on warfarin are now suggested to continue treatment rather than the temporary interruption for 1-7 days. However, if it is held for procedures with high risk of gastrointestinal bleeding, the new guidelines recommend against bridging anticoagulation unless the patient has a mechanical heart valve.

For patients treated with DOACs, the investigators suggest temporarily interrupting treatment rather than continued use.

Also, patients on dual antiplatelet therapy for secondary prevention are now suggested to temporarily interrupt the P2Y12 receptor inhibitor while continuing ASA.

If the patient is on cardiac ASA monotherapy for secondary prevention, the investigators suggest against its interruption.

A Lack of Evidence

There were also several areas the investigators explored creating guidance for but could not find sufficient evidence for new recommendations.

For example, patients with acute gastrointestinal bleeding being treated with warfarin, the investigators could not make a call on PCC administration compared to placebo. They also could not recommend for or against temporary interruption of the P2Y12 receptor inhibitor for patients on a single P2Y12 inhibiting agent in the elective periprocedural endoscopy setting.

Finally, they were unable to make a recommendation on same-day resumptions of warfarin, DOACs, or P2Y12 receptor inhibitor drugs compared to 1-7 days following the procedure due to insufficient evidence.

Future Studies

However, there were several limitations observed in the guidelines.

“The greatest limitation to the panel's ability to provide unequivocal clinical recommendations was the certainty of evidence in the published literature,” the authors wrote. “As highlighted throughout this clinical practice guideline, insufficient high-quality evidence exists in antithrombotic and antiplatelet drug users to evaluate strategies for the temporary interruption, drug reversal, and resumption against a comparator group with great certainty.”

Other limitations include too few studies focusing on advanced endoscopic procedures and a low certainty or absence of evidence comparing treatment strategies.

“We suggest future studies focus on areas where insufficient evidence currently exists to inform clinical decisions,” the authors wrote. “In particular, the potential benefit of PCC use for reversal of warfarin in the setting of acute GIB, the appropriate timing of resumption of P2Y12 receptor inhibitors and anticoagulants (VKA and DOACs) after elective endoscopy, and whether it is necessary to interrupt P2Y12 inhibitor antiplatelet monotherapy before elective endoscopy.”

The study, “American College of Gastroenterology-Canadian Association of Gastroenterology Clinical Practice Guideline: Management of Anticoagulants and Antiplatelets During Acute Gastrointestinal Bleeding and the Periendoscopic Period,” was published online in The American Journal of Gastroenterology.