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Study 2 (the experimental part of this study) did not require ethics approval because it did not involve either clinical or animal experimentation.","order":1,"name":"Ethics","label":"Ethics approval","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"All patients provided written informed consent.","order":2,"name":"Ethics","label":"Patient consent statement","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"No animal experimentation was performed in this study, while the non-flesh porcine left ventricular myocardium was used for\n                      ex vivo\n                      analysis.","order":3,"name":"Ethics","label":"Animal studies","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"Not applicable.","order":4,"name":"Ethics","label":"Registry","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"Kengo Kusano received speaker honoraria from Daiichi Sankyo Company and Medtronic, and research grants from Medtronic and JSR outside the submitted work. Koji Miyamoto received funding, grants, and speaker honoraria from Medtronic, Biosense Webster, Abbott, and Boston Scientific outside the submitted work. He is also affiliated with a department endowed by Medtronic outside the submitted work. Tsukasa Kamakura received honoraria from Biosense Webster, Medtronic, and Boston Scientific outside the submitted work. Nobuhiko Ueda and Satoshi Oka received honoraria for lectures from Medtronic outside the submitted work. Akinori Wakamiya received honoraria for lectures from Biosense Webster, Medtronic, and BIOTRONIK outside the submitted work. The other authors had no conflicts of interest to declare.","order":5,"name":"Ethics","label":"Competing interests","group":{"name":"EthicsHeading","label":"Declarations"}}]}}