<s>[INST] My 8 week old baby has the whooping cough, he recently was admitted to hospital as doctors are concerned about him throwing up and him being irratable. Xray shows dark spots on his chest and an enlarged heart? What does this mean? He is going to have an MRI today to check the heart. [/INST] Hi, Welcome to ChatDoctorYour query has 2 aspects. Let me deal with it one by one.First big heart in the X-ray is a need to evaluate the status of the heart in an infant. The causes can vary from a simple infection related change to a major abnormal dilatation of the heart or can be normal in some child Chat Doctor.  It surely warrants an echo evaluation and hope there won't be anything abnormal finding. Dark spots on the chest is not very clear to me. If you mean dark spots on the X-ray then it can mean aerated areas which can be normal such as bronchial markings. It is hard to comment on it without seeing a X-ray. So I am sorry I can't be of help for that query. If you may revert to me with some more details may be a pic of the X-ray, then would be of great help to explain. Hope your child gets well soon. Take care </s>