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Introduction The objective of this study is to explore the impacts of Omaha System-based continuing care on medication compliance, quality of life (QOL), and prognosis of coronary heart disease (CHD) patients after percutaneous coronary intervention (PCI). Methods A total of 100 CHD patients who were hospitalized and received PCI were selected and divided into the control group and the observation group, 50 patients per group, according to a random number table method. The control group was given routine care, while the observation group was applied Omaha System-based continuing care on the basis of the control group. Results Follow-up demonstrated that the Morisky-Green score of the observation group was significantly higher than that of the control group (P<0.001), indicating that the medication compliance of the observation group was significantly better than that of the control group (P<0.001). The short form-36 (SF-36) scores were notably higher after nursing compared with on admission; SF-36 scores of the observation group were significantly increased than those of the control group (P<0.001). The incidence of major adverse cardiac event (MACE) in the observation group was significantly lower than in the control group (P<0.001). The nursing satisfaction of the observation group was considerably higher than that of the control group (P<0.01). Conclusion Omaha System-based continuing care could improve the medication compliance and QOL, reduce the incidence of MACE, and benefit the prognosis of CHD patients after PCI.