Frequently used as an abbreviation for secondary to. You might also see it written as 2 or 2/2. Feb 7, '11. We were told to use s/t instead of r/t if the defining characteristic you cite in your NDX statement is an MDX rather than a sign or symptom.
Examples of heart-related causes of chest pain include: Heart attack. A heart attack is a result of a blood clot that's blocking blood flow to your heart muscle. Angina. Thick plaques can gradually build up on the inner walls of the arteries that carry blood to your heart.
Overall, the most common causes of chest pain are. 1  Disorders of the ribs, rib cartilage, chest muscles (musculoskeletal chest wall pain), or nerves in the chest. 2  Inflammation of the membrane that covers the lungs (pleuritis) 3  Inflammation of the membrane that covers the heart (pericarditis)