Doctors performed a chest X-ray which revealed ... This means that rather than opening so that blood can flow from the top chamber of the heart—the right atrium—down into the bottom chamber ...

Chest x-ray results take more than 10 minutes to obtain, complications cannot be detected during the procedure, and chest x-ray can detect a pneumothorax with only 50% sensitivity in a supine patient.

The right ventricle pumps the blood to the lungs, where the blood releases waste gases and picks up oxygen. The newly oxygen-rich blood (shown in red) returns to the heart and enters the left atrium.

Learn about and revise the cardiovascular system with this BBC Bitesize GCSE PE (OCR) study guide.

A cardiac ASD (atrial septal defect) is a type of congenital heart disease (CHD).Approximately eight children out of a thousand are born with a CHD. About 10% of these CHDs are atrial septal defects.

Learn about and revise the cardiovascular system with this BBC Bitesize GCSE PE (Edexcel) study guide.