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 ......
Medical News |

Effects of Cold Air, Smoking on Cardiac Function Studied With Apex Cardiogram

JAMA. 1964;187(13):29-30. doi:10.1001/jama.1964.03060260077042.
Text Size: A A A
Published online


Chest wall vibrations, subaudible to the ear but electronically recordable, may provide clinicians with a greater understanding of internal cardiac function. These vibrations, set in motion by cardiac contraction, are being recorded on an instrument called the apex cardiogram by E. Grey Dimond, MD, and Alberto Benchimol, MD, of the Institute for Cardio Pulmonary Diseases at the Scripps Clinic and Research Foundation in La Jolla, Calif.

"We are using a very crude instrument," Dimond told The Journal, "and we are looking forward to its refinement and hope it becomes a useful diagnostic and therapeutic aid."

Since 1957, Dimond and Benchimol have been recording the movements of the chest wall overlying the left and right ventricles and designating these tracings as the apex cardiogram (ACG). "Others have measured the speed of the movement of these vibrations (vibrocardiogram) and the energy of the movement (kinetocardiogram ). We have all been interested in these subaudible,


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.