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 ......

Artificial Hearts, Fractured Valves, and Other Problems With Medical Devices

Nir KOSSOVSKY, MD; Ram Kossowsky, PhD; Manuel Dujovny, MD
JAMA. 1985;254(23):3307. doi:10.1001/jama.1985.03360230037006.
Text Size: A A A
Published online

To the Editor.—  Recently, two separate articles on the artificial heart program appeared simultaneously in The Journal.1,2 Both articles failed to mention important medical details on three biomedical device issues: medical device failures, thrombogenicity of silicone, and infections with percutaneous implants. With literally millions of medical devices in use, it is important for today's physician to understand the nature of the body's reaction to devices as well as the devices' reaction to long-term implantation in the body.First, the fracture of the weld of Barney Clark's Björk-Shiley heart valve on the 13th postoperative day is described as being a manifestation of Murphy's Law.2 This is incorrect. The Björk-Shiley 60° convexoconcave valves have a fundamental flaw in the weld and, as of Sept 25, 1984, 107 cases of valve failure due to strut fracture have been reported; two thirds of which were estimated by Shiley to be fatal.3


Sign in

Purchase Options

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




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.