A condition characterised by dilatation of the main pulmonary artery and stretching of the valve ring, due to pulmonary hypertension.
Breathing dysfunction resulting in impairment in the oxygen and car¬ bon dioxide exchange required for body function; also referred to as respiratory insufficiency. Pulmonary insufficiency results in reduced oxygen levels or elevated levels of carbon dioxide, which cause respiratory acidosis, a condition affecting acid-base balance of the body. Pulmonary insufficiency can progress to respiratory failure.