Limited attention has been given to chronotropic incompetence (CI) in patients that have heart failure with a preserved ejection fraction (HFpEF). PURPOSE: To determine the prevalence of CI in the HFpEF population in addition to examining the impact BB have on this prevalence rate. METHODS: Subject data from 3 previous studies were retrospectively analyzed. Exercise testing for each of the 195 subjects (>60 years of age) was performed on an electronically braked bicycle to symptom limited maximal level using 3-min increments (12, 25, 50, 75 W). Patients were diagnosed with CI if they were unable to reach 80% of their age predicted maximal heart rate (APMHR) while achieving a RER of ≥ 1.05. If the RER criterion was not met the Wilkoff mathematical model was employed. Patients on BB were classified as having CI by the previously discussed criteria as well as using 62% of their APMHR with an RER of ≥ 1.05. RESULTS: Outcomes indicate that 29.8% of the total population met CI criteria and 26.4% of patients not on BB had CI. Furthermore 38.2% of patients on BB had CI using the 80% of APMHR criteria while only 7.3% had CI using the 62% of APMHR criteria. A Chi squared tests showed a significant difference between Non-BB vs BB 62% (P =.005) and BB 80% vs BB 62% (P =.0003). CONCLUSION: This data suggests that the overall prevalence of CI in the HFpEF population is similar to that seen in the HFrEF population (∼30%). These findings add more evidence demonstrating that the two forms of HF share many pathophysiological similarities. The data suggests that the CI criteria of 80% may be too high and the 62% may be too low for HFpEF patients on BB. Future studies are needed to determine the appropriate CI criteria for HFpEF patients on BB.TABLE