Learn more: Angina is chest pain or discomfort caused when your heart muscle doesn't get enough oxygen-rich blood. It may feel like pressure or squeezing in your chest. The discomfort also can occur in your shoulders, arms, neck, jaw, or back.Angina pain may even feel like indigestion.But, angina is not a disease.earn more: Angina is chest pain or discomfort caused when your heart muscle doesn't get enough oxygen-rich blood. It may feel like pressure or squeezing in your chest. The discomfort also can occur in your shoulders, arms, neck, jaw, or back. Angina pain may even feel like indigestion.
Definition of leaven. 1a : a substance (such as yeast) used to produce fermentation in dough or a liquid; especially : sourdoughb : a material (such as baking powder) used to produce a gas that lightens dough or batter.
For other uses, see LPN (disambiguation). A licensed practical nurse (LPN) in much of the United States and most Canadian provinces is a nurse who cares for people who are sick, injured, convalescent, or disabled. LPNs work under the direction of registered nurses or physicians.