Endocardial catheter mappingvalidation of a cineradiographic method for accurate localization of left ventricular sites
作者:
RICHARD,
HAUER ROBERT,
HEETHAAR MICHEL,
DE ZWART RUUD,
VAN DIJK INGEBORG,
VAN DER TWEEL CORNELIUS,
BORST ETIENNE,
期刊:
Circulation
(OVID Available online 1986)
卷期:
Volume 74,
issue 4
页码: 862-868
ISSN:0009-7322
年代: 1986
出版商: OVID
数据来源: OVID
摘要:
To guide surgical therapy for ventricular tachycardia by preoperative endocardial catheter mapping, accurate anatomic localization of arrhythmogenic sites is mandatory. For this reason we developed a mathematical cineradiographic method to compute left ventricular sites relative to three anatomic reference points: the centers of aortic and mitral valve ostia and the left ventricular apex. To validate the method 14 epicardial left ventricular markers were implanted in four dogs to simulate arrhythmogenic sites. Distances between markers and the anatomic references were calculated and the results were compared with postmortem measurements. The difference between calculated and measured distances was 0.5 ± 3. 1 mm (mean ± SD), confirming accurate localization of anatomic marker sites. However, in surgery the results have to be displayed in a practically applicable, unambiguous way. Therefore, wire skeletons were constructed to represent calculated endocardial marker sites relative to the anatomic reference points. To validate this approach, 14 markers were implanted in the left ventricular subendocardium in four dogs. Wire skeletons were constructed, one for each marker site, and inserted postmortem into the left ventricular cavity via a 2 cm incision. In all cases the correct indication of a marker site by the corresponding wire skeleton was confirmed by fluoroscopic inspection in multiple projections. This wire skeleton technique may enhance the practical usefulness of preoperative endocardial catheter mapping.
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