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Topic: Ductus arteriosus

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Patent ductus arteriosus

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Fetus

	Patent Ductus Arteriosus (PDA), Cincinnati Children's Hospital Medical Center
		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: 2007-09-17)
		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.
		The ductus arteriosus is a temporary fetal blood vessel that connects the aorta and the pulmonary artery before birth.
	www.ahealthyadvantage.com /topic/topic100587270 (1966 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 - Wikipedia, the free encyclopedia
		Patent ductus arteriosus (PDA) is a congenital heart defect wherein a child's ductus arteriosus fails to close after birth.
		A patent ductus arteriosus allows oxygenated blood to flow down its pressure gradient from the aorta to the pulmonary arteries.
		A chest X-ray may be taken, which reveals the structure of the infant's heart and the size and configuration of its chambers.
	en.wikipedia.org /wiki/Patent_ductus_arteriosus (561 words)

	Patent Ductus Arteriosus (Site not responding. Last check: 2007-09-17)
		Patent ductus arteriosus is a frequent indication for surgical intervention in preterm infants.
		Thereafter, three groups were defined for analysis: group 1 with obliterated ductus arteriosus; group 2 with patent ductus arteriosus without a retrograde flow in the subdiaphragmatic aorta; and group 3 with patent ductus arteriosus and a retrograde flow in the subdiaphragmatic aorta.
		Ductus closure was seen in six of eight infants after the first dose of indomethacin and in five of eight infants after the first dose of ibuprofen.
	www.pediheart.org /searches/topic/pda.htm (11937 words)

	Patent Ductus Arteriosus (PDA) (Site not responding. Last check: 2007-09-17)
		Surgical closure of patent ductus arteriosus in the premature infant with respiratory distress.
		The relationship of symptomatic patent ductus arteriosus to respiratory distress in premature newborn infants.
		Closure of the ductus arteriosus with indomethacin in ventilated neonates with respiratory distress syndrome.
	www.umdnj.edu /rspthweb/bibs/pda.htm (1542 words)

	patent ductus arteriosus (Site not responding. Last check: 2007-09-17)
		Patent ductus arteriosus (PDA) is the failure of a duct, or passageway, between two specific blood vessels to close.
		Serious cases of patent ductus arteriosus are diagnosed at birth.
		The cause of patent ductus arteriosus is unknown.
	www.northmemorial.com /HealthEncyclopedia/content/48.asp (561 words)

	Persistent Ductus Arteriosus
		The ductus is on of a number of nature's "short circuits" which allows blood to bypass the baby's lungs whilst in the womb, at which time the lungs resist blood flow.
		In the case of a large ductus this is advised to stop the extra blood flow into the lungs, which increases the workload on the heart and lungs.
		Even for a small ductus which may not be causing any great increase in the workload, closure is recommended as the narrow tube of the ductus is a possible site for the development of infection from any bacteria that might enter the heart via the blood stream.
	www.altonweb.com /cs/downsyndrome/cardpda.html (524 words)

	U-M CVC - Patent Ductus Arteriosis
		Patent ductus arteriosus (PDA) occurs when a blood vessel that is normal while a baby in the womb fails to close after the baby is born.
		If the ductus is small, the extra blood flow is minimal but if the ductus is large, there can be a large amount of blood returning to the lungs causing a significant increased workload for the heart.
		If the patent ductus does not close spontaneously by one or two years of age or if there are symptoms of congestive heart failure that are not controlled by medication, closure of the defect is recommended.
	www.med.umich.edu /cvc/mchc/parpat.htm (1266 words)

	Patent ductus arteriosus (Site not responding. Last check: 2007-09-17)
		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)

	Gale Encyclopedia of Medicine: Patent ductus arteriosus
		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 (609 words)

	Chesapeake Veterinary Cardiology Associates (Site not responding. Last check: 2007-09-17)
		Patent Ductus Arteriosus results from a failure of the body at birth to close a normal in-utero blood vessel called the ductus arteriosus.
		The ductus communicates between the aorta and pulmonary artery when the puppy or kitten is in the uterus.
		The special coils are then carefully placed in the vessel, which causes a blood clot to form in the ductus arteriosus.
	www.cvcavets.com /showpracfaq.cfm?FAQID=2117&Private=1 (543 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).
		The ductus arteriosus allows most of the blood to bypass the lungs and go to the rest of the body.
		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.
	uuhsc.utah.edu /wcservices/nbicu/virtualtour/common_problems/pda.html (694 words)

	Patent Ductus Arteriosus (Site not responding. Last check: 2007-09-17)
		The ductus arteriosus is a normal structure that is open (patent) during normal fetal development in the womb.
		The infection, or rupture of the ductus, may be fatal.
		A patent ductus in an infant older than three months or so, or a symptomatic ductus in a premature infant or a neonate, is an indication for closure.
	www.cardioaccess.com /diag04.html (277 words)

	patent ductus arteriosus, PDA (Site not responding. Last check: 2007-09-17)
		Patent ductus arteriosus, or PDA, is a malformation of the heart caused by failure of normal closure of the ductus arteriosus, a direct connection between the aorta and the pulmonary artery which is present and functional during fetal life but which is unnecessary once air-breathing begins.
		Normally the ductus closes shortly after birth; this process of closure by muscular contraction is reversible for a short time - it can be reopened under hormonal control (prostaglandins).
		Very young patients with heart or lung disease may need to have the ductus repaired to prevent too much blood from flowing back from the high pressure side of the circulation - the aorta.
	www.drhull.com /EncyMaster/P/patent_ductus_arteriosus.html (157 words)

	Patent Ductus Arteriosus (Site not responding. Last check: 2007-09-17)
		The ductus arteriosus is a wide muscular blood vessel joining the pulmonary artery (main artery to the lungs) to the aorta (main artery to the body).
		Diagram of a heart with a PDA (patent ductus arteriosus): blood flows from the left ventricle, into the aorta, and then into the pulmonary artery (instead of going to the body where it is needed).
		The ductus can be closed surgically or, in some children, a device placed through the artery into the ductus can be used.
	www.pedisurg.com /PtEduc/PDA.htm (326 words)

	Patent ductus arteriosus PDA
		A patent ductus arteriosus is a normal structure found in the unborn human and animal, however, by the third day after birth it usually closes
		The Ductus Arteriosus is derived from the left sixth aortic arch.
		Although the ductus arteriosus may be patent in pups less than four days of age it generally closes by seven or eight days after birth.
	www.vetsurgerycentral.com /pda.htm (2847 words)

	High-Risk Newborn - Patent Ductus Arteriosus (PDA)
		Patent ductus arteriosus (PDA) is a condition in which the connecting blood vessel between the pulmonary artery and the aorta in fetal circulation, called the ductus arteriosus, stays open in a newborn baby.
		In the fetus, blood is shunted from the pulmonary artery to the aorta through the ductus arteriosus.
		Because the ductus arteriosus is no longer needed, it normally begins to wither and close off.
	www.schneiderchildrenshospital.org /peds_html_fixed/peds/hrnewborn/pda.htm (626 words)

	About Patent Ductus Arteriosus (PDA)
		The ductus arteriosus is a passageway between two major blood vessels: the pulmonary artery and the aorta.
		If the ductus arteriosus remains open (referred to as "patent") blood that should have gone through the aorta and on to the body goes back into the lungs.
		It is not known why the ductus arteriosus remains open in some children.
	www.mayoclinic.org /pda/details.html (321 words)

	eMedicine - Patent Ductus Arteriosus : Article by Steven Neish, MD, SM (Site not responding. Last check: 2007-09-17)
		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.
		While a left ductus arteriosus is a normal structure during normal fetal development, the presence of a right ductus arteriosus usually is associated with other congenital abnormalities of the cardiovascular system, most typically involving the aortic arch or conotruncal development.
		The larger the internal diameter of the narrowest portion of the ductus arteriosus, the larger the left-to-right shunt.
	www.emedicine.com /ped/topic1747.htm (3415 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)

	Children's Heart Institute \| Heart Defects: Patent Ductus Arteriosus
		Ductus Arteriosus is a passageway which normally is present in every baby before birth.
		Patent Ductus Arteriosus is a condition that exists when the Ductus does not close.
		This condition also varies depending on how wide the Ductus Arteriosus opening is. A small opening may not produce any symptoms.
	www.childrenheartinstitute.org /educate/defects/ductus1.htm (195 words)

	Patent Ductus Arteriosus (Site not responding. Last check: 2007-09-17)
		Patent ductus arteriosus, or PDA, is the most common congenital heart defect in dogs.
		It is caused by a structural defect in the wall of the ductus arteriosus.
		Occlusion of the ductus also can be achieved with placement of an intravascular coil or plug.
	cal.vet.upenn.edu /cardiosf/project/pdapres/pdaprs1.htm (91 words)

	CHIN: Patent Ductus Arteriosus (PDA): A Parent's Guide
		The ductus arteriosus is a normal part of the circulation of the fetus.
		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.
		This is due to either an absence of the normal oxygen sensors in the ductus muscle, or a weakness of the muscle which does not allow complete closure.
	tchin.org /resource_room/c_art_16.htm (1079 words)

	Patent Ductus Arteriosus (Site not responding. Last check: 2007-09-17)
		The ductus arteriosus is part of the normal fetal circulatory system.
		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.
	www.chw.org /display/PPF/DocID/1365/router.asp (320 words)

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