Sex- and Age-Related Differences in Echocardiographic Measurements of Left Ventricular Circumferential Strain in Normal Subjects: Results from the World Alliance of Societies of Echocardiography Study

¹University of Chicago Medical Center, Chicago, IL;²MedStar Health Research Institute, Washington, DC;³Jeyalakshmi Heart Center, Madurai, India;⁴University of Salerno, Salerno, Italy;⁵University of Tokyo, Tokyo, Japan;⁶Hospital Bernardette, Guadalajara, Mexico;⁷Medanta Medicity, Gurgoan, India;⁸University of Washington, Seattle, WA;⁹King's College Hospital, London, United Kingdom;¹⁰University of Milano-Bicocca, Milan, Italy;¹¹First Cardiology Consultants Hospital Ikoyi, Lagos, Nigeria;¹²Samsung Medical Center, Seoul, Korea, Democratic People's Republic of;¹³Hospital Israelita Albert Einstein, São Paulo, Brazil;¹⁴Instituto Cardiovascular de Buenos Aires, Buenos Aires, Argentina;¹⁵Rajaie Cardiovascular Medical Center, Tehran, Iran, Islamic Republic of;¹⁶GenesisCare, Brisbane, Australia;¹⁷University of Occupational and Environmental Health, Kitakyushu, Japan;¹⁸University of Toronto, Toronto, ON, Canada;¹⁹Philippine Heart Center, Quezon City, Philippines;²⁰Qilu Hospital of Shandong University, Jinan, China;²¹TomTec Imaging Systems, Unterschleissheim, Germany.