Breathing disorders are also called respiratory diseases. Respiratory diseases range from a mild condition as the common cold to life-threatening conditions as bacterial pneumonia, pulmonary embolism and lung cancer. Respiratory disorders are common symptoms of lung and heart disease, emotions or injury. Breathing problems may also be caused emotional disorders as anger, anxiety, fear and panic attack. The possible complications of respiratory disorders are heart failure, myocardial infarction, organ failure or dysfunction, respiratory failure, stroke, spread of cancer and spread of infection.