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 |

Right Bundle-Branch Block and the Velocity of the Electrocardiogram

Raul Gamboa, MD; Dwarka N. Gupta, MB, BS; Nancy White, MD
Arch Intern Med. 1967;120(3):286-292. doi:10.1001/archinte.1967.00300030028006.
Text Size: A A A
Published online

WITH the development of computer techniques applied to electrocardiographic analyses, emphasis has been shifted to quantitative rather than qualitative interpretation of the electrocardiogram. Conduction defects represent one of the areas of electrocardiography where quantitation is most desirable. It has been demonstrated that neither the duration of the QRS interval nor the subjective estimation of the slurrings observed in the QRS complex permits an accurate quantitation of progressive degrees of right bundle-branch block.1-4 The study of the spatial velocity of the ECG might represent an optimal method for quantitative studies of ventricular conduction defects.5-6

The object of this investigation was to study the effects of variable degrees of right bundle-branch block on the velocity of directional changes in the orthogonal ECG.

Material and Methods  Right bundle-branch block occurred in two patients during the course of right ventricular catheterization. The first patient (case 1) was a 6-year-old child with a

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.

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();