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. 2021 Aug 3;12:680618. doi: 10.3389/fphar.2021.680618

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Copyright © 2021 Honda, Li, Hino, Tsujimoto and Lee.

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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Dose-response of calcium ion channel regulator in CT and AM. Comparison of MP parameters: beat rate, PWD30cF, PWD80cF, PWD30-80 in CT and AM after application of calcium ion channel blocker verapamil and diltiazem, as well as the selective calcium channel activator Bay K 8644. Error bars represent SD of the mean from the values of independent experiments. n = 6. *p < 0.05, **p < 0.01 for comparison of drug treatment of CT vs. AM. Bay K8644 data: reuse from the conference paper with permission (Honda, 2020).