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. 2022 Mar 22;9:787869. doi: 10.3389/fcvm.2022.787869

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Copyright © 2022 Song, Ko, Lee, Choi, Cha, Kim, Park, Lee, Kang, Shim, Uhm, Kim, Kim, Kim, Park, Joung and Park.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Kaplan–Meier curves. The primary endpoint according to the heart rate in patients with HFpEF, HFmrEF, and HFrEF is shown. HFpEF, heart failure with preserved ejection fraction; HFmrEF, heart failure with mid-range ejection fraction; HFrEF, heart failure with reduced ejection fraction.