Did you know that an innocuous throat infection in your child could lead to a serious condition later on in their life? We spoke to Dr Syamasis Bandyopadhyay from Apollo Gleneagles Kolkata about the disease how it functions and the latest treatments available. How does a rheumatic fever progress to a heart disease? The problem starts with a person suffering from a condition called rheumatic fever as a child. Since this fever is often very slight it is ignored. The child may subsequently have joint pain and active rheumatic carditis (a condition where the heart is inflamed due to infection).