It is feasible the AF caused the left atrial enlargement. Alternately the left atrial enlargement might have caused the AF. There the circle starts. The trick is to find out which came first, because the left atrial enlargement might be caused by something else. I'm not sure how they can tell about the left atrial enlargement from an ecg, until the echo.
Freebase(0.00 / 0 votes)Rate this definition: Parenteral is the introduction of nutrition, a medication, or other substance into the body via a route other than the mouth, especially via infusion, injection or implantation. Parenteral nutrition is nutrition via the veins.
1 4. DEFINITION Parenteral preparation or injectables are the sterile solutions or suspensions of drug in aqueous or oily vehicles meant for introduction into the body by means of an injection under or through one or more layers of the skin or mucous membrane. 2  5.