Risk Score Predicts GI Bleeding Among Post-PCI Patients

PHILADELPHIA — Gastrointestinal (GI) bleeding after percutaneous coronary intervention (PCI) among patients on dual antiplatelet therapy (DAPT) remains risky in terms of morbidity and mortality, but the Predicting Bleeding Complications in Patients Undergoing Stent Implantation and Subsequent Dual Antiplatelet Therapy (PRECISE-DAPT) score could help predict that risk, according to a study presented at the American College of Gastroenterology (ACG) 2024 Annual Scientific Meeting.

In a predominantly Hispanic population in Texas, 2.5% of post-PCI patients on DAPT had GI bleeding in the first year. The PRECISE-DAPT score helped to predict GI bleeding among high-risk and moderate-risk patients.

“Our study established that the PRECISE-DAPT score possesses a moderate predictive accuracy not only for overall bleeding risk but also specifically for gastrointestinal bleeding,” said lead author Jesus Guzman, MD, a gastroenterology fellow at the Texas Tech University Health Sciences Center El Paso.

Current guidelines from the American College of Cardiology and American Heart Association recommend DAPT for 6-12 months post-PCI, with consideration for shorter durations in patients with lower ischemic risks but higher bleeding risks.

“Interestingly, some of these patients were on DAPT for more than 2 years, which goes beyond the guidelines,” he said. “In this patient population, this has to do with them being lost to follow-up and getting reestablished, and they kept refilling their prescriptions.”

Guzman and colleagues conducted a retrospective cohort study of patients receiving DAPT after PCI from 2014 to 2021. They looked for GI bleeding rates at 1 year and across the duration of the study period, as well as endoscopic indications, findings, concurrent antiplatelet therapy, and the primary cause of bleeding.

In addition, the research team evaluated the predictive value of the PRECISE-DAPT score, which categorizes patients based on low risk (≤ 17), moderate risk (18-24), and high risk (≥ 25) for bleeding. The score aims to optimize the balance between bleeding and ischemic risks, Guzman said, by incorporating five factors: Age, creatinine clearance, hemoglobin, white blood cell count, and history of spontaneous bleeding.

Among 1067 patients, 563 (57.9%) received clopidogrel and 409 (42%) received ticagrelor. The overall cohort was 66.6% men, 77.1% Hispanic, and had a mean age of 62 years.

The GI bleeding rate was 2.5% at 1-year post-PCI among 27 patients and 3.7% for the study duration among 39 patients, with a median follow-up of 2.2 years.

Among the 39 GI bleeds, 41% were lower GI bleeds, 28% were upper GI bleeds, 15% were small bowel bleeds, and 15% were undetermined. The most frequent etiology was colon cancer, accounting for 18% of bleeds, followed by 15% for gastric ulcers, 10% for diverticular bleeds, and 10% for hemorrhoidal bleeds.

In general, analyses indicated no significant differences in GI bleeding between patients on clopidogrel (21.2%) and those on ticagrelor (19.2%).

However, the odds of GI bleeding were significantly higher in patients with high-risk PRECISE-DAPT scores (odds ratio [OR], 2.5) and moderate-risk scores (OR, 2.8) than in those with low-risk scores. The majority of patients without GI bleeding had scores 24. An optimal threshold for the PREDICT-DAPT score was identified as ≥ 19.

“When patients on DAPT present with GI bleeding, it can be a clinical conundrum for gastroenterologists and cardiologists, especially when it can be a life-or-death event, and stopping DAPT can increase risk of thrombosis,” said Jeff Taclob, MD, a hepatology fellow at The University of Tennessee Health Science Center in Memphis, Tennessee. Taclob, who wasn’t involved with the study, attended the conference session.

“In this population in El Paso, in particular, many patients don’t have adequate healthcare, may be lost to follow-up, and get their prescriptions filled elsewhere, such as Juárez, Mexico,” he said. “Then they come in with this life-threatening bleed, so we need to focus more on their risks.”

Paying attention to specific patient populations, cultures, and values remains important for patient communication and clinical decision-making, Taclob noted.

“In this population of older men, there’s often a macho persona where they don’t want to seek help,” he said. “DAPT criteria could differ in other populations, but here, the PREDICT-DAPT score appeared to help.”

The study was awarded the ACG Outstanding Research Award in the GI Bleeding Category (Trainee). Guzman and Taclob reported no relevant disclosures.