Author + information
- Received October 29, 1992
- Revision received April 5, 1994
- Accepted June 30, 1994
- Published online December 1, 1994.
- Arne SippensGroenewegen, MDa,∗,
- Hans Spekhorst, MD∗,
- Norbert M. van Hemel, MD†,
- J.Herre Kingma, MD†,
- Richard N.W. Hauer, MDa,
- Jacques M.T. de Barker, PhD∗,
- Cornelis A. Grimbergen, PhD∗,
- Michiel J. Janse, MD∗ and
- Arend J. Dunning, MD, FACC∗
- ↵∗Address for correspondence: Dr. Arne SippensGroenewegen, Department of Cardiology, Heart Lung Institute, University Hospital Utrecht, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands.
Objectives. This study examined the performance of the 62-lead body surface electrocardiogram (ECG) in identifying the site of origin of ventricular tachycardia in patients with a previous myocardial infarction.
Background. Because the accuracy of ECG localization of ventricular tachycardia using standard 12-lead recordings is restricted to the identification of rather large ventricular areas, application of multiple torso lead recordings may augment the resolving power of the surface ECG and result in more discrete localization of arrhythmogenic foci.
Methods. Thirty-two patients were selected for electrophysiologically guided ablative therapy for drug-resistant postinfarction ventricular tachycardia. In these patients, QRS integral maps of distinct monomorphic ventricular tachycardia configurations were correlated with a previously generated infarct-specific reference data base of paced QRS integral maps. Each paced pattern in the data base corresponded with ectopic endocardial impulse formation at 1 of 18 or 22 discrete segments of the left ventricle with a previous anterior or inferior myocardial infarction, respectively. Electrocardiographic localization was compared with the results obtained during intraoperative or catheter endocardial activation sequence mapping.
Results. Body surface mapping was performed during 101 distinct ventricular tachycardia configurations. Compared with the activation mapping data that were acquired in 64 of 101 ventricular tachycardias, body surface mapping identified the correct segment of origin in 40 (62%) of 64 tachycardias, a segment adjacent to the segment where the arrhythmia actually originated in 19 (30%) of 64 tachycardias and a segment disparate from the actual segment of origin in 5 (8%) of 64 tachycardias. With respect to infarct location, the segment of origin was correctly identified in 28 (60%) of 47 ventricular tachycardias in patients with anterior, 7 (70%) of 10 tachycardias ia patients with inferior and 5 (71%) of 7 tachycardias in patients with combined anterior and inferior myocardial infarction.
Conclusions. This study shows that body surface mapping enables precise localization of the origin of postinfarction ventricular tachycardia in 62% and regional approximation in 30% of tachycardias. The multiple-lead ECG nay be used to guide and shorten catheter-based mapping procedures during ventricular tachycardia and to provide relevant information on the origin of tachycardias that cannot be mapped with conventional single-site mapping techniques because of unfavorable characteristics.
☆ This study was supported by Grant 85027 from The Netherlands Heart Foundation. The Hague. The Netherlands.
☆☆ It was presented at the 67th Annual Scientific Sessions of the American Heart Association, Dallas, Texas, November 1994.
- Received October 29, 1992.
- Revision received April 5, 1994.
- Accepted June 30, 1994.