0
We're unable to sign you in at this time. Please try again in a few minutes.
Retry
We were able to sign you in, but your subscription(s) could not be found. Please try again in a few minutes.
Retry
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 |

THE SIZE OF THE HEART IN EXPERIMENTAL HYPERTHYROIDISM

J. P. SIMONDS, M.D.; W. W. BRANDES, M.D.
Arch Intern Med (Chic). 1930;45(4):503-512. doi:10.1001/archinte.1930.00140100025002.
Text Size: A A A
Published online

Accurate data concerning the effect of hyperthyroidism on the size of the heart do not appear to be available in the literature. Not only is the heart rate markedly increased in this condition but, according to Samson Wright,1 the stroke volume in exophthalmic goiter averaged 116 cc., as compared with the normal of from 70 to 120 cc. at rest; the minute output averaged 11.7 liters as compared with from 5 to 8 liters in normal persons at rest. The increased output of the heart may not be due to the tachycardia per se, for Stewart and Crawford2 induced regular tachycardias by means of single induced break shocks thrown into the auricle at a regular rapid rate of between 250 and 400 per minute, and found that the blood flow was usually unchanged and in one third of the observations it was decreased.

Observations on the size of the heart

Topics

Sign in

Create a free personal account to sign up for alerts, share articles, and more.

Purchase Options

• Buy this article
• Subscribe to the journal

First Page Preview

View Large
First page PDF preview

Figures

Tables

References

Correspondence

CME
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.
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.
Submit a Comment

Multimedia

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

Web of Science® Times Cited: 12

Sign in

Create a free personal account to sign up for alerts, share articles, and more.

Purchase Options

• Buy this article
• Subscribe to the journal

Related Content

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

Jobs
brightcove.createExperiences();