Abstract 394: Effect Of Introduction Of Non Invasive Risk Stratification On Cardiac Catheterization Referrals In A Community Hospital.

Background: Appropriate use criteria recommend against unwarranted cardiac catheterization (caths) in low risk patients. Reporting of risk stratification on non-invasive cardiac stress test reports was implemented at our institution to reduce low risk cardiac cath referrals. Methods: We performed a retrospective study to compare the effect of introduction of risk stratification in cardiac stress test reports. The percentages of low risk patients by nuclear stress, who underwent cardiac cath, before and after application of risk stratification were compared. Chi-square and Mann-Whitney-Wilcoxon tests were used for analysis. Results: There were significantly fewer low risk referrals after risk stratification, 43.2% of patients of low-risk patients were referred for catheterization before, compared to 28.3% of low-risk patients after risk stratification (p value 0.01). There was reduction in the percentage of normal cardiac caths in the low risk category after introduction of risk stratification (61.5% vs 33.3%, p value 0.05). Conclusion: Risk stratification led to a decrease in the percentage of low-risk patients referred for cath following a stress test.