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 ......


Arch Intern Med (Chic). 1940;66(5):1095-1111. doi:10.1001/archinte.1940.00190170086006.
Text Size: A A A
Published online

In this communication we describe the signs and symptoms commonly found in ambulatory hospital patients who have subnormal basal or resting circulations, ascertained by estimating their cardiac output. The clinical syndrome exhibited by such patients is definite enough to permit the diagnosis of this abnormality in many instances when methods of estimating cardiac output are not available.

Determinations of cardiac output were begun in this hospital in 1927 by means of the ethyl iodide method.1 At first extremely slow and laborious, the speed of operation was later increased by adaptation of the katharometer to our analytic needs by Donal and Gamble.2 In all, 335 subjects were tested by this method over a period of eight years.3 The advent of the ballistocardiogram4 permitted us to estimate cardiac output with a speed and ease of operation equal to those of other routine clinical methods. In the last three years the total experience


Sign in

Purchase Options

• Buy this article
• Subscribe to the journal

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.
Submit a Comment


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

Sign in

Purchase Options

• Buy this article
• Subscribe to the journal

Related Content

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