Powered by


                    Home  |  Forums  |  Humor  |  Advertising  |  Contact
   Health Questions

   News via RSS






   Forum Archives





















   Primary Care






   Other Sections


   Research Tools

   Medical Tutorials

   Medical Software




Back to Cardiovascular Diseases


Patent ductus arteriosus

This is a condition in which there is persistant patency of the ductus arteriosus. The ductus is 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. Its patency is normally obliterated by the constriction resulting from the inhibition of prostaglandins. This condition is common in rubella infection and high altitudes or prematurity.

The hemodynamic effects are similar to aortic incompetence. In cases complicated with Eisenmenger's syndrome there is reversal of the shunt with consequent differential cyanosis.


Treatment is always to close the patency. This may be attempted with indomethacin in premature infants. Surgery is delayed in infective endocarditis. It is contraindicated if the pulmonary vascular resistance exceeds 70% of the systemic resistance.

advertisement.gif (61x7 -- 0 bytes)

Are you a doctor or a nurse?

Do you want to join the Doctors Lounge online medical community?

Participate in editorial activities (publish, peer review, edit) and give a helping hand to the largest online community of patients.

Click on the link below to see the requirements:

Doctors Lounge Membership Application

previous.gif (72x17 -- 347 bytes) next.gif (72x17 -- 277 bytes)



 advertisement.gif (61x7 -- 0 bytes)



Tools & Services: Follow DoctorsLounge on Twitter Follow us on Twitter | RSS News | Newsletter | Contact us

Copyright 2001-2017
Doctors Lounge.
All rights reserved.

Medical Reference:
Diseases | Symptoms
Drugs | Labs | Procedures
Software | Tutorials

Links | Humor
Forum Archive
CME Articles

Privacy Statement
Terms & Conditions
Editorial Board
About us | Email