noun, Physiology. 1. an instrument, often attached to an inflatable air-bladder cuff and used with a stethoscope, for measuring blood pressure in an artery. He who worships his sphygmomanometer as a thing apart and infallible will sooner or later come to grief.
Pericarditis is an inflammation of the tissue layers surrounding the heart. The chest pain of pericarditis is usually sharp and stabbing. It can radiate to the back, neck, or arm. The pain may worsen when taking a deep breath or lying flat and lessen when leaning forward.
Breathe deeply into your abdomen, not just your chest. Proper breathing should be deep, slow and rhythmic and done through the nose, not the mouth. Each breath should ideally last three to four seconds breathing in and three to four seconds breathing out. Deep full breaths that fill your lungs use your diaphragm.