In vivo validation of a novel method for regional myocardial wall motion analysis based on echocardiographic tissue tracking
| Autor: | Peter Lysyansky, Eugene Konyukhov, Dan Adam, Amir Landesberg, Dan Rappaport |
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| Rok vydání: | 2007 |
| Předmět: |
Tissue tracking
Sheep Correlation coefficient business.industry Heart Ventricles Cardiac Pacing Artificial Hemodynamics Biomedical Engineering Ventricular Function Left Computer Science Applications Electrocardiography medicine.anatomical_structure Ventricle In vivo Image Interpretation Computer-Assisted medicine Animals Circumferential strain Stress Mechanical Wall motion business Lateral wall Ultrasonography Biomedical engineering |
| Zdroj: | Medical & Biological Engineering & Computing. 46:131-137 |
| ISSN: | 1741-0444 0140-0118 |
| DOI: | 10.1007/s11517-007-0281-z |
| Popis: | The objective of this study was to validate a recently developed tissue tracking (TT) method for cardiac motion, by comparing it with precise invasive measurements of motion and to prove its capability to reflect moderate hemodynamic changes induced by asynchronous activation. In four open-chest sheep, sono-crystals measured the left ventricle(LV) equator’s diameters simultaneously with 2D ultrasound acquisition. The LV was paced either from the posterior or from the lateral wall, just prior to the normal LV activation. Global functional indices were calculated based on the regional motions extracted by the TT method. The correlation coefficient between the shortening of the diameters and the global circumferential strain (GCS) was 0.99 ± 0.004. The peak GCS differentiated between the pacing modes (paired t test, P |
| Databáze: | OpenAIRE |
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