Cristiano Ronaldo is widely regarded as one of the greatest footballers of all time, but few know that his remarkable career was nearly cut short before it even began due to a rare heart condition.
At the age of 15, Ronaldo was diagnosed with tachycardia, a condition that caused his heart to beat abnormally fast, even when at rest. This diagnosis was alarming, especially for a budding athlete whose fitness and stamina would be key to his success.
