Some fun milestones: 1  The diameter of the Milky Way is 100,000 light years; the observable Universe had this as its radius when it was approximately 3 years old.  When the Universe was one year old, it was much hotter and denser than it is now. The mean temperature of the Universe was more than 2 million Kelvin.
(high blood pressure) as a cause of chest pain in both men and women is listed first because it is the single most common cause of chest pain, including coronary artery disease itself. In other words, more people suffer from chest pain due to high blood pressure than those who have chest pain because of obstructive coronary artery disease.
One of the more frequent causes of non-cardiac chest pain is chest wall pain or musculoskeletal chest pain -- that is, chest pain related to the muscles and bones of the chest wall. Doctors diagnose chest wall pain in at least 25% of patients who come to the emergency room for chest pain.