TITLE

FURTHER VOLTAGE AUGMENTATION BY EMPLOYING THE GEOMETRIC MID-POINT TECHNIQUE AND A NEW FRONTAL-PLANE ELECTROCARDIOGRAPHS LEAD PLACEMENT

AUTHOR(S)
Tse, Rose L.; Lee, Tak Y.
PUB. DATE
November 1973
SOURCE
Angiology;Nov1973, Vol. 24 Issue 10, p635
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Based upon a simple derivation, an unconventional frontal-plane ECG lead system (G-leads) has been developed by taking advantage of the concept of ‘geometric mid-points’ and the effect of proximity to the heart. The method is simple and existing ECG machines can be employed with little or no modification. These ‘G-lead’ placements have been found: (a) To be reproducible in a given individual. (b) To be greater in voltages (on average 2 times) than those of the conventional leads. (c) To permit earlier detection of inferior wall infarction than the conventional ECG lead placement—this feature becomes especially important when mere angina pectoris has to be differentiated from an infarction in those patients in whom revascularization procedure is being contemplated. Obviously more data will have to be collected in patients with angina and/or myocardial infarction before a critical and final evaluation of the usefulness of the ‘G-lead’ system can be completed. The G-lead type of electrode placements is not particularly enhancing for the precordial leads because any attempt to devise a G-version of the precordial lead by changing merely the elements of the indifferent electrode from the conventional set (RA, LA, LF) to (V6, V6R, M) would result in no augmentation or special advantage since such changes involve only the moving of the indifferent electrode from one electrical zero to another.
ACCESSION #
16360195

 

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