Background and study aims: Dual antiplatelet therapy (DAPT) is recommended following percutaneous coronary intervention
(PCI) with drug-eluting stent (DES). DAPT is a risk factor for gastrointestinal bleeding.
We aimed to quantify (1) the rate of gastroscopy within 12 months after PCI, (2) the
rate of adverse cardiac events and gastroscopy-related bleeding complications within
30 days of gastroscopy, and (3) the association between antiplatelet therapy and these
events.
Patients and methods: Patients receiving gastroscopy within 12 months of PCI were identified and two nested
case-control analyses were performed within the PCI cohort by linking Danish medical
registries. Cases were patients with adverse cardiac events (cardiac death, myocardial
infarction, or stent thrombosis) or hemostatic intervention. In both studies, controls
were patients with gastroscopy including biopsy without adverse cardiac events and
hemostatic intervention, respectively. Medical records were reviewed to obtain information
on exposure to DAPT.
Results: We identified 22 654 PCI patients of whom 1497 patients (6.6 %) underwent gastroscopy.
Twenty-two patients (1.5 %) suffered an adverse cardiac event, 93 patients (6.2 %)
received hemostatic intervention during or within 30 days of the index gastroscopy.
Interrupting DAPT was associated with a 3.46 times higher risk of adverse cardiac
events (95 %CI 0.49 – 24.7). Discontinuation of one antiplatelet agent did not increase
the risk (OR 0.65, 95 %CI 0.17 – 2.47). No hemostatic interventions were caused by
endoscopic complications.
Conclusion: Gastroscopy can be safely performed in PCI patients treated with DES and single antiplatelet
therapy while interruption of DAPT may be associated with an increased risk of adverse
cardiac events.