Olympic 100-meter swim champion to have heart surgery
SYDNEY — Rio Olympics 100-meter freestyle gold medalist Kyle Chalmers has withdrawn from July’s world swimming championships to undergo surgery for a worsening heart condition. Chalmers has supraventricular tachycardia, or recurrent rapid heartbeat, that is normally not life-threatening but can impact on his quality of life. “I have increasingly begun to suffer from an abnormally