We're unable to sign you in at this time. Please try again in a few minutes.
We were able to sign you in, but your subscription(s) could not be found. Please try again in a few minutes.
There may be a problem with your account. Please contact the AMA Service Center to resolve this issue.
Contact the AMA Service Center:
Telephone: 1 (800) 262-2350 or 1 (312) 670-7827  *   Email: subscriptions@jamanetwork.com
Error Message ......
Article |

Intrapulmonary Shunts in Congenital Heart Disease

Arno R. Hohn, MD; Jon B. Tingelstad, MD; Raquel Israel, MD; Iain F. S. Black, MD; Edward C. Lambert, MD
Am J Dis Child. 1968;115(2):202-206. doi:10.1001/archpedi.1968.02100010204008.
Text Size: A A A
Published online


IN THE ABSENCE of pulmonary disease, reduced systemic arterial oxygen saturation is usually accepted as evidence of a right-to-left intracardiac shunt in patients with congenital heart disease. However, several authors1-4 have reported reduced arterial oxygen saturations in both systemic arterial and pulmonary venous samples in some patients with large left-to-right shunts. They suggested that this was caused by rapid flow through dilated pulmonary channels, impaired diffusion resulting from a high pulmonary flow, or a bypass of the alveoli through precapillary shunts in such patients.

With one exception4 these workers employed methods which measured only oxygen content and saturation in assessing the right-to-left intrapulmonary shunts. Because of the conflicting opinions regarding such shunts investigated by relatively insensitive techniques, it was felt worthwhile to reevaluate them with modern polarographic measurements of oxygen tension.

Due to the shape of the blood oxygen dissociation curve, the current polarographic method of direct measurement


Sign in

Purchase Options

• Buy this article
• Subscribe to the journal
• Rent this article ?

First Page Preview

View Large
First page PDF preview





Also Meets CME requirements for:
Browse CME for all U.S. States
Accreditation Information
The American Medical Association is accredited by the Accreditation Council for Continuing Medical Education to provide continuing medical education for physicians. The AMA designates this journal-based CME activity for a maximum of 1 AMA PRA Category 1 CreditTM per course. Physicians should claim only the credit commensurate with the extent of their participation in the activity. Physicians who complete the CME course and score at least 80% correct on the quiz are eligible for AMA PRA Category 1 CreditTM.
Note: You must get at least of the answers correct to pass this quiz.
Please click the checkbox indicating that you have read the full article in order to submit your answers.
Your answers have been saved for later.
You have not filled in all the answers to complete this quiz
The following questions were not answered:
Sorry, you have unsuccessfully completed this CME quiz with a score of
The following questions were not answered correctly:
Commitment to Change (optional):
Indicate what change(s) you will implement in your practice, if any, based on this CME course.
Your quiz results:
The filled radio buttons indicate your responses. The preferred responses are highlighted
For CME Course: A Proposed Model for Initial Assessment and Management of Acute Heart Failure Syndromes
Indicate what changes(s) you will implement in your practice, if any, based on this CME course.


Some tools below are only available to our subscribers or users with an online account.

0 Citations

Sign in

Purchase Options

• Buy this article
• Subscribe to the journal
• Rent this article ?

Related Content

Customize your page view by dragging & repositioning the boxes below.