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Patent ductus arteriosus (PDA) is a medical condition in which the ductus arteriosus fails to close after birth: this allows a portion of oxygenated blood from the left heart to flow back to the lungs from the aorta, which has a higher blood pressure, to the pulmonary artery, which has a lower blood pressure.
Pathological demand avoidance (PDA) or extreme demand avoidance (EDA) is a proposed disorder, and proposed sub-type of autism spectrum disorder, defined by characteristics such as a demand avoidance—which is a greater-than-typical refusal to comply with requests or expectations—and extreme efforts to avoid social demands.
The PDA supplies the posterior third of the interventricular septum. The remaining anterior two-thirds is supplied by the left anterior descending artery, which is a branch of left coronary artery. It is typically a branch of the right coronary artery (70%, known as right dominance).
Video explanation. Author: Tanner Marshall, MS Editor: Rishi Desai, MD, MPH, Tanner Marshall, MS “Patent” (not “patent” like an invention) refers to some opening, and a patent ductus arteriosus, which I’m going to call PDA, for short, refers to a blood vessel—the ductus arteriosus—which connects the pulmonary artery to the aorta during fetal development.
Past medical history (see also medical history) PSI: Pneumonia severity index: PSP: phenylsulphtalein: PSS: progressive systemic sclerosis (see scleroderma) PSVT: paroxysmal supraventricular tachycardia: PT: prothrombin time physical therapy (physiotherapy) Pt. patient (from Latin patiens, meaning "one who endures" or "one who suffers") PTA
Patent ductus arteriosus (PDA) is an abnormal connection between the aorta and the pulmonary artery, which normally should be closed in infancy. Since aortic pressure is higher than pulmonary pressure, a continuous murmur occurs. This murmur is often described as a machinery murmur, or Gibson's murmur. [2]
Prostaglandin E 1 (PGE 1) is a naturally occurring prostaglandin and is also used as a medication (alprostadil). [2]In infants with congenital heart defects, it is delivered by slow injection into a vein to open the ductus arteriosus until surgery can be carried out. [3]
Abbreviation Meaning q: each, every (from Latin quaque) q15: every 15 minutes q6h q6° once every 6 hours q2wk: once every 2 weeks qAc Before every meal (from Latin quaque ante cibum) q.a.d. every other day (from Latin quaque altera die) QALY: quality-adjusted life year: q.AM: every day before noon (from Latin quaque die ante meridiem) q.d.