As a young athlete, Cristiano Ronaldo was diagnosed with Tachycardia (via Olympics.com). According to the Mayo Clinic, tachycardia is a term for a rapid heartbeat of over 100 times per minute. An array of conditions can cause the heart's face-paced beating. Although it could be harmless, the intensive beating can lead to a stroke or heart failure. After several tests and exams, Ronaldo underwent heart surgery. He was 15 years old.
"They used a sort of laser to cauterise the source of the problem," his mother, Dolores Aveiro (pictured above with Ronaldo) told the Daily Mail in 2009. "He was operated on in the morning and came out at the end of the afternoon."
Although his mother was fearful of how the surgery will affect his career, Ronaldo was adamant that he would be fine. "Cristiano wasn't very worried – he didn't take the situation very seriously," she recalled. "But I got a big fright." The results were such that the young Ronaldo returned to the field only a couple of days after the surgery.
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