Localization of a ventricular tachycardia-focus with multichannel magnetocardiography and three-dimensional current density reconstruction
| Autor: | K. J. Wolf, Rahul Agrawal, G. Feilcke, Michael Oeff, K. Reither, K. Czerski, Müller Hp, P. Gödde |
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| Rok vydání: | 1999 |
| Předmět: |
Adult
Male Physics medicine.diagnostic_test Focus (geometry) medicine.medical_treatment Coordinate system Biomedical Engineering Magnetic resonance imaging General Medicine Gold standard (test) Iterative reconstruction Ablation Ventricular tachycardia medicine.disease Electrophysiology Electrocardiography Magnetics Image Processing Computer-Assisted Tachycardia Ventricular medicine Humans Female Magnetocardiography Biomedical engineering |
| Zdroj: | Journal of Medical Engineering & Technology. 23:108-115 |
| ISSN: | 1464-522X 0309-1902 |
| Popis: | The objective of this case report is to determine the accurate localization of a malignant ventricular tachycardia (VT) focus by combining multichannel magnetocardiographic (MCG) information with morphologic data. The localization was obtained by calculating the three-dimensional current density distribution (3D-CDD) on the left ventricular surface. To estimate the accuracy of this localization technique, examinations of a healthy volunteer were additionally performed. The MCG-signals were recorded in a magnetically shielded room by a 49-channel magnetogradiometer. The corresponding morphologic information was recorded by magnetic resonance tomography (MRT). The coordinate systems were matched with the help of markers. The 3D-CDD was calculated by the Philips CURRY software package. The origin of a malignant VT determined by X-ray images of the ablation catheter position during the electrophysiological examination (EPE), was used as the gold standard. This was then compared with the localization results obtained by the 3D-CDD. It was found that the localization coordinates showed a difference of less than 10 mm. |
| Databáze: | OpenAIRE |
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