Asthma is a disease in which inflammation of the airways causes airflow into and out of the lungs to be restricted. When an asthma attack occurs, the muscles of the bronchial tree become tight and the lining of the air passages swells, reducing airflow and producing the characteristic wheezing sound. Mucus production is increased.
The word asthma is derived from the Greek aazein, meaning "sharp breath".
Pulmonary embolism refers to the obstruction of the base or one or more branches of the pulmonary arteries by a thrombus (or thrombus) that originates somewhere in the venous system or in the right side of the heart. Gas exchange is impaired in the lung mass supplied by the obstructed vessel. Massive pulmonary embolism is life-threatening and can cause death within the first 1 to 2 hours after the embolic event.
It is a common disorder associated with trauma, surgery (orthopedic, major abdominal, pelvic, gynecologic), pregnancy, oral contraceptive use, congestive heart failure, age older than 50 years, hypercoagulable states, and prolonged immobility. Most thrombi originate in the deep veins of the legs.
This is an autosomal recessive inheritance disease caused by a defective gene which causes the body to produce thick, sticky mucus that clogs the lungs, making it difficult to breathe and causing life-threatening lung infections.
Cystic fibrosis is an autosomal recessive condition - that means that a person needs two defective genes (one from each parent) to develop the condition. The gene that has been thought to cause cystic fibrosis is called cystic fibrosis transmembrane conductance regulator or CFTR. This gene has been located on chromosome 7