Faculty Collaboration Database

Computerized potential distribution mapping: a new intraoperative mapping technique for ventricular tachycardia surgery. Ann Thorac Surg 1990 Apr;49(4):649-55

Date

04/01/1990

Pubmed ID

2322062

DOI

10.1016/0003-4975(90)90317-y

Scopus ID

2-s2.0-0025317244 (requires institutional sign-in at Scopus site)   5 Citations

Abstract

This study evaluated potential distribution mapping as a method for localizing the site of origin of ventricular tachycardia (VT). In contrast to conventional activation time maps, potential distribution maps require less editing and thus can be more automated and rapidly processed for interpretation of multiple beats of VT. As a series of potential distribution maps during VT is required for detailed analysis, an on-line computerized system was designed to display potential distribution maps sequentially at 1-ms intervals as a color movie. Potential distribution maps and activation time maps were constructed from 182 epicardial and endocardial unipolar electrodes during 12 episodes of reproducible monomorphic VT in 9 dogs four to six days after experimental myocardial infarction (mean cycle length, 162 +/- 21 ms). At the onset of each depolarization during VT, a potential minimum abruptly developed on the surviving epicardium and another on the surviving endocardium of the left ventricle, both immediately adjacent to the subendocardial infarct. These two minima on the initial potential distribution maps corresponded to the sites of earliest epicardial and endocardial activation breakthrough recorded on the activation time maps. These two minima subsequently expanded or moved into the adjacent area and coincided with the spread of activation fronts on the epicardial and endocardial surfaces. Thus, the rapid display of sequential, computerized potential distribution maps of multiple beats of VT provides a dynamic means of identifying the site of origin of VT, and therefore should facilitate intraoperative mapping.

Author List

Harada A, Tweddell JS, Schuessler RB, Branham BH, Boineau JP, Cox JL

MESH terms used to index this publication - Major topics in bold

Action Potentials
Analog-Digital Conversion
Animals
Dogs
Electrocardiography
Electrodes, Implanted
Electrophysiology
Female
Heart Conduction System
Image Processing, Computer-Assisted
Intraoperative Care
Male
Myocardial Contraction
Myocardial Infarction
Online Systems
Tachycardia