Effect of age and gender on ventricular-arterial coupling estimated using a non-invasive technique.

"Declarations Ethics approval and consent to participateThe study was approved by the Research Ethics Committee of Fukui-ken Saiseikai Hospital (No.2017-010). The study was performed in accordance with the ethical standards as laid down in the 1964 Declaration of Helsinki and its later amendments. Written informed consent was obtained from all individual participants in the study. Consent for publicationNot applicable. Competing interestsThe authors declare no competing interests. Competing interests The authors declare no competing interests."

"Funding This research was supported by the Japan Agency for Medical Research and Development (AMED) under Grant Number JP22hk0102081 and the Japan Society for the Promotion of Science (JSPS) KAKENHI Grant Number JP19K1826."