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Topic: Patent ductus arteriosus

	Patent ductus arteriosus - Wikipedia, the free encyclopedia
		Patent ductus arteriosus (PDA) is a congenital heart defect wherein a child's ductus arteriosus fails to close after birth.
		In the developing fetus, the ductus arteriosus (DA) is a shunt connecting the pulmonary artery to the aortic arch that allows much of the blood from the right ventricle to bypass the fetus' fluid-filled lungs.
		Patent DA is common in infants with persistent respiratory problems such as hypoxia, and has a high occurrence in premature children.
	en.wikipedia.org /wiki/Patent_ductus_arteriosus (561 words)

	Patent Ductus Arteriosus (PDA), Cincinnati Children's Hospital Medical Center (Site not responding. Last check: 2007-10-08)
		The ductus arteriosus is a patent vessel that courses between the aorta and the pulmonary artery.
		The ductus arteriosus is part of the fetal pathway that helps to distribute oxygen from the mother to the baby's organs and allows blood flow to avoid the lungs, which do not need high blood flow at that time.
		However, if the patent ductus arteriosus is not large, it may cause absolutely no symptoms at all and may be detected only upon further evaluation of a heart murmur.
	cincinnatichildrens.org /health/heart-encyclopedia/anomalies/pda.htm (1155 words)

	Patent Ductus Arteriosus \| aHealthyAdvantage (Site not responding. Last check: 2007-10-08)
		Patent ductus arteriosus (PDA) is the failure of the ductus arteriosus to close after birth, allowing blood to inappropriately flow from the aorta into the pulmonary artery.
		Patent ductus arteriosus (PDA) is a heart defect that occurs when the ductus arteriosus (the temporary fetal blood vessel that connects the aorta and the pulmonary artery) does not close at birth.
		PDA can be a result of an environmental exposure before birth, inheriting a specific changed or mutated gene or genes, a symptom of a genetic syndrome, or be caused by a combination of genetic and environmental factors (multifactorial).
	www.ahealthyadvantage.com /topic/topic100587270 (1966 words)

	patent ductus arteriosus (Site not responding. Last check: 2007-10-08)
		Patent ductus arteriosus (PDA) is the failure of a duct, or passageway, between two specific blood vessels to close.
		The cause of patent ductus arteriosus is unknown.
		Proper vaccination with the MMR vaccine may minimize the incidence of PDA that is rubella-related.
	www.northmemorial.com /HealthEncyclopedia/content/48.asp (561 words)

	Patent Ductus Arteriosus
		Patent ductus arteriosus (PDA) is the most common extra cardiac shunt which represents a persistent patency of the vessel that normally connects the pulmonary arterial system and the aorta in the fetus.
		Ductus arteriosus is mediated by the release of vasoactive substances (acetylcholine, bradykinin, endogenous catecholamines, etc.), and variations in pH.
		Resistance of the ductus is related to the cross sectional area and the length of the duct itself.
	www.perfline.com /congenital/pda.html (468 words)

	Patent Ductus Arteriosus (Site not responding. Last check: 2007-10-08)
		Patent ductus arteriosus, or PDA, is the most common congenital heart defect in dogs.
		PDA is most common in miniature and toy breeds, but has been diagnosed in over 60 breeds.
		It is caused by a structural defect in the wall of the ductus arteriosus.
	cal.vet.upenn.edu /cardiosf/project/pdapres/pdaprs1.htm (91 words)

	Gale Encyclopedia of Medicine: Patent ductus arteriosus (Site not responding. Last check: 2007-10-08)
		Patent ductus arteriosus (PDA) is the failure of the ductus arteriosus to close after birth, allowing blood to inappropriately flow from the aorta into the pulmonary (lung) artery.
		The ductus arteriosus is a normal opening between the aortic arch and the pulmonary artery that functions while the fetus is in the uterus.
		The ductus arteriosus is an opening between the aortic arch and the pulmonary artery that allows some of the blood pumped from the right ventricle toward the lungs to bypass the lungs and enter the aortic arch for distribution throughout the body.
	www.findarticles.com /p/articles/mi_g2601/is_0010/ai_2601001031 (618 words)

	Patent Ductus Arteriosus - PetPlace.com (Site not responding. Last check: 2007-10-08)
		The ductus arteriosus is a blood vessel that connects the two main arteries of the body — the aorta and the pulmonary artery.
		Patent ductus arteriosis (PDA) is a birth defect representing the second most common congenital heart defect of dogs.
		PDA is common in the miniature poodle, collie, Maltese, Shetland sheepdog, German shepherd dog, cocker spaniel, Pomeranian, and Labrador retriever.
	petplace.netscape.com /articles/artShow.asp?artID=224 (670 words)

	About Patent Ductus Arteriosus (PDA)
		The ductus arteriosus is a passageway between two major blood vessels: the pulmonary artery and the aorta.
		PDA is seen more often in premature infants and in infants born to a mother who had rubella during the first trimester of pregnancy.
		PDA occurs in 1 of 2,500-5,000 infants, and females are two to three times more likely than males to have a PDA.
	www.mayoclinic.org /pda/details.html (321 words)

	The Pharmacology of the Ductus Arteriosus -- Smith 50 (1): 35 -- Pharmacological Reviews
		to the closure of the ductus (Clyman, 1987
		closure of the ductus in the offspring (Hornblad and Larsson,
		in the fetal rabbit ductus arteriosus is temporally and spatially
	pharmrev.aspetjournals.org /cgi/content/full/50/1/35 (8249 words)

	Patent Ductus Arteriosus, What Is..., NHLBI DCI
		Patent ductus arteriosus (PDA) is a congenital heart disease.
		PDA is twice as common in girls as in boys.
		In the case of PDA, the shunting of blood from the aorta to the lungs irritates the lining of the left pulmonary artery where the PDA connects.
	www.nhlbi.nih.gov /health/dci/Diseases/pda/pda_what.html (628 words)

	Heart Problems: Patent Ductus Arteriosus (PDA)
		The ductus arteriosus is very important in the adaptation process.
		This is a small communicating blood vessel between the pulmonary artery (which carries blood to the lungs), and the aorta (which carries blood to the rest of the body).
		This may be the case from birth or, it may develop because the PDA is so large that the pressure in the lungs, and resultant resistance to this pressure, markedly increase.
	www.pcoc.net /pda.htm (958 words)

	Patent Ductus Arteriosus (PDA) - Lucile Packard Children's Hospital
		PDA is the sixth most common congenital heart defect, occurring in 6 to 11 percent of all children with congenital heart disease.
		Patent ductus arteriosus occurs twice as often in girls as in boys.
		When the ductus arteriosus stays open, oxygen-rich (red) blood passes from the aorta to the pulmonary artery, mixing with the oxygen-poor (blue) blood already flowing to the lungs.
	www.lpch.org /DiseaseHealthInfo/HealthLibrary/cardiac/pda.html (2101 words)

	Patent Ductus Arteriosus
		Where the ductus does not close, the dog is left with a patent ductus arteriosus (PDA).
		PDA is the most commonly diagnosed congenital heart defect in dogs.
		Usually a PDA is first suspected when the veterinarian hears the characteristic continuous "machinery" heart murmur when your dog is examined at the time of vaccination.
	www.upei.ca /~cidd/Diseases/cardiovascular%20diseases/PDA.htm (959 words)

	Patent ductus arteriosus (Site not responding. Last check: 2007-10-08)
		The ductus arteriosus is a shunt which directs blood away from the pulmonary trunk during fetal life.
		At birth, the ductus arteriosus clamps down to form the ligamentum arteriosum and normal systemic blood flow is established.
		The current treatment for patent ductus arteriosus is the administration of a prostaglandin inhibitor, such as ibuprofen.
	sprojects.mmi.mcgill.ca /embryology/cvs/anom_pda.html (130 words)

	Patent ductus arteriosus
		The ductus arteriosus is a blood vessel in a fetus that connects the pulmonary artery, which carries blood to the lungs, and the aorta, which carries blood to the body, so that blood flow bypasses the lungs.
		A patent ductus arteriosus allows some oxygen-rich blood to flow from the aorta back into the pulmonary artery and to the lungs instead of to the rest of the body.
		Eventually, if the patent ductus is not closed, a baby may develop an infection of the heart's inner lining (infective endocarditis) or heart failure.
	my.webmd.com /hw/health_guide_atoz/stp2089.asp?navbar=hw253545 (252 words)

	Patent Ductus Arteriosus
		The ductus arteriosus is a blood vessel connecting the main vessel leading to the lungs (pulmonary artery) to the main vessel of the body (aorta).
		If the ductus will not close with indomethacin or if your baby's doctor does not think your baby should have this drug, the PDA may be tied off (ligated) surgically through a surgical procedure including an incision in the baby's chest.
		A PDA in a premature infant is not considered a malformation.
	uuhsc.utah.edu /wcservices/nbicu/virtualtour/common_problems/pda.html (694 words)

	Leading hospitals - London, UK for heart and lung disease (Site not responding. Last check: 2007-10-08)
		The ductus arteriosus, in utero, connects the proximal left pulmonary artery to the descending aorta, just distal to the left subclavian artery.
		A large PDA is rare in the adult, most having been corrected in infancy and childhood.
		The presence of a PDA (except the silent duct at one extreme and the presence of severe, irreversible pulmonary vascular disease at the other extreme).
	www.rbh.nthames.nhs.uk /Cardiology/Consensus/patent.htm (893 words)

	Patent Ductus Arteriosus - New Jersey
		The ductus arteriosus is a passageway between the pulmonary artery and the aorta that allows blood in the baby to bypass the unused lungs and carry oxygen to the other organs.
		A PDA causes a heart murmur because of the blood flow from the aorta to the pulmonary artery.
		The coils are placed in the PDA during cardiac catheterization, a procedure in which a small hollow tube is inserted into the heart through a large vein.
	www.somersetmedicalcenter.com /1645.cfm (779 words)

	CHIN: Patent Ductus Arteriosus (PDA): A Parent's Guide
		The ductus arteriosus is a normal part of the circulation of the fetus.
		The ductus itself is a blood vessel lined with muscles, which serves a specific function.
		Once the ductus is closed, the blood from the right side of the heart only travels to the lungs, as is the case in the adult circulation.
	tchin.org /resource_room/c_art_16.htm (1079 words)

	Patent Ductus Arteriosus
		The other main feature of the PDA is a "machinery" or "continuous murmur." Explain how it comes to be that you hear a murmur in both systole and diastole.
		The ductus is supposed to close within 72 hours of birth.
		The Branham reflex is represented by a drop in heart rate and rise in aortic pressure as the ductus is ligated.
	www.vin.com /vin_ce/abvp/html/patent_ductus_arteriosus.html (731 words)

	MedlinePlus Medical Encyclopedia: Patent ductus arteriosus
		Patients with PDA have a characteristic heart murmur that can be heart with a stethoscope.
		Surgical treatment of PDAs is performed on older children even if they have no symptoms because the PDA will not close by itself.
		If the patent ductus is not closed, the infant has a risk of developing heart failure or infective endocarditis.
	www.nlm.nih.gov /medlineplus/ency/article/001560.htm (431 words)

	► Patent ductus arteriosus
		Patent ductus arteriosus (PDA) is a condition where a temporary blood vessel near an unborn baby's heart, the ductus arteriosus, fails to close after birth.
		Before a baby is born, blood flow normally bypasses its lungs because oxygen and nutrients are received from the placenta and the umbilical cord.
		After birth, when the infant begins to breathe, two structures in the heart -- the foramen ovale and the ductus arteriosus -- close in order to deliver fully oxygenated blood to the body.
	www.umm.edu /ency/article/001560.htm (246 words)

	Patent Ductus Arteriosus (Site not responding. Last check: 2007-10-08)
		Prior to birth the ductus arteriosus allows for antegrade flow from the right ventricle to the aorta.
		Left-to-right shunting of blood caused by patency of the ductus arteriosus results in increased pulmonary artery blood flow as well as left atrial and left ventricular overload.
		The PDA is isolated and either ligated or divided.
	www.chw.org /display/PPF/DocID/1365/router.asp (320 words)

	eMedicine - Patent Ductus Arteriosus : Article by Steven Neish, MD, SM (Site not responding. Last check: 2007-10-08)
		The ductus arteriosus is a remnant of the distal sixth aortic arch and connects the pulmonary artery at the junction of the main pulmonary artery and the origin of the left pulmonary artery to the proximal descending aorta just after the origin of the left subclavian artery.
		The larger the internal diameter of the narrowest portion of the ductus arteriosus, the larger the left-to-right shunt.
		Beginning at the ductus arteriosus, the course of blood flow in a typical PDA with pulmonary overcirculation is as follows: PDA, pulmonary artery, pulmonary capillaries, pulmonary veins, left atrium, left ventricle, aorta, PDA.
	www.emedicine.com /ped/topic1747.htm (3415 words)

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