There are certain symptoms that indicate heart disease or heart failure in childhood. Weight development is usually insufficient in heart diseases (failure to thrive). Also a drinking weakness can indicate a heart problem. This manifests itself e.g. through exhaustion or increased sweating while drinking. Other signs that may indicate a heart defect are respiratory failure (rapid breathing), frequent respiratory infections, or water retention. Acute problems can manifest themselves through fainting or tachycardia in older children and blue sickness in younger and older children. If you notice such symptoms in your child, talk to the pediatrician. He decides whether a heart examination by a specialist is necessary.