JTCS Tips for Better Browsing
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

This Article
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Add to Personal Folders
Right arrow Download to citation manager
Right arrow Permission Requests
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Tyers, G. F.
Right arrow Articles by Waldhausen, J. A.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Tyers, G. F.
Right arrow Articles by Waldhausen, J. A.

The Journal of Thoracic and Cardiovascular Surgery, Vol 69, 8-16, Copyright © 1975 by The American Association for Thoracic Surgery and The Western Thoracic Surgical Association

ARTICLES

The advantages of transthoracic placement of permanent cardiac pacemaker electrodes

GF Tyers, HC Hughes Jr, HA Torman and JA Waldhausen

To determine the effect of stimulation site on cardiac pacing thresholds, identical, small-surface area, cathodal, Elgiloy electrodes were placed intramyocardially on the left and right ventricular apices and transvenously into the right ventricular apex of 20 dogs in complete heart block. At seven stimulus durations, threshold voltage and current were measured directly with an oscilloscope and current probe. Left ventricular intramyocardial pacing required less threshold stimulus energy than right ventricular intramyocardial or right ventricular endocardial pacing. Previous studies that determined lower thresholds with transvenous right ventricular endocardial leads than with directly placed myocardial leads used stimulating electrodes of differing configuration, surface area, and materials at the different sites and/or used epicardial rather than intramyocardial electrodes. These factors biased the results in favor of the endocardial site. When all clinical and electrophysiological facotrs are considered, direct intramyocardial placement of electrodes deserves a much wider acceptance and application than it now enjoys.




HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
ANN THORAC SURG ASIAN CARDIOVASC THORAC ANN EUR J CARDIOTHORAC SURG
J THORAC CARDIOVASC SURG ICVTS ALL CTSNet JOURNALS
Copyright © 1975 by The American Association for Thoracic Surgery.