Electromechanical wave imaging (EWI) validation in all four cardiac chambers with 3D electroanatomic mapping in caninesin vivo
| Autor: | Elaine Wan, Hasan Garan, Alexandre Costet, Elisa E. Konofagou, Julien Grondin, Ethan Bunting |
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| Rok vydání: | 2016 |
| Předmět: |
Male
Electroanatomic mapping Materials science Heart Ventricles 030204 cardiovascular system & hematology Article 030218 nuclear medicine & medical imaging 03 medical and health sciences Dogs 0302 clinical medicine 3d mapping Heart Conduction System Image Processing Computer-Assisted medicine Animals Radiology Nuclear Medicine and imaging Heart Atria Normal Sinus Rhythm Radiological and Ultrasound Technology business.industry Ultrasound Arrhythmias Cardiac Signal Processing Computer-Assisted medicine.anatomical_structure Ventricle Cardiac chamber Imaging technique Electrical conduction system of the heart Electrophysiologic Techniques Cardiac business Biomedical engineering |
| Zdroj: | Physics in Medicine and Biology. 61:8105-8119 |
| ISSN: | 1361-6560 0031-9155 |
| DOI: | 10.1088/0031-9155/61/22/8105 |
| Popis: | Characterization and mapping of arrhythmias is currently performed through invasive insertion and manipulation of cardiac catheters. Electromechanical wave imaging (EWI) is a non-invasive ultrasound-based imaging technique, which tracks the electromechanical activation that immediately follows electrical activation. Electrical and electromechanical activations were previously found to be linearly correlated in the left ventricle, but the relationship has not yet been investigated in the three other chambers of the heart. The objective of this study was to investigate the relationship between electrical and electromechanical activations and validate EWI in all four chambers of the heart with conventional 3D electroanatomical mapping. Six (n = 6) normal adult canines were used in this study. The electrical activation sequence was mapped in all four chambers of the heart, both endocardially and epicardially using the St Jude's EnSite 3D mapping system (St. Jude Medical, Secaucus, NJ). EWI acquisitions were performed in all four chambers during normal sinus rhythm, and during pacing in the left ventricle. Isochrones of the electromechanical activation were generated from standard echocardiographic imaging views. Electrical and electromechanical activation maps were co-registered and compared, and electrical and electromechanical activation times were plotted against each other and linear regression was performed for each pair of activation maps. Electromechanical and electrical activations were found to be directly correlated with slopes of the correlation ranging from 0.77 to 1.83, electromechanical delays between 9 and 58 ms and R 2 values from 0.71 to 0.92. The linear correlation between electrical and electromechanical activations and the agreement between the activation maps indicate that the electromechanical activation follows the pattern of propagation of the electrical activation. This suggests that EWI may be used as a novel non-invasive method to accurately characterize and localize sources of arrhythmias. |
| Databáze: | OpenAIRE |
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