Abstract
Objective: This study was performed to evaluate the left ventricular systolic circumferential function of piglets using two dimensional speckle tracking imaging (2DS). Methods: Twenty-five piglets were studied in the open-chest situation. The short axis views were displayed at the midventricular level directly from the surface of the heart using a 10 MHz pediatric sector probe on a GE Vivid 7 Dimension ultrasound system. 2D images were stored and transferred to EchoPAC workstation for offline strain analysis using three consecutive cardiac cycles of acquired loops. The left ventrieular pressure (±dp/dt) curves were obtained synchronously. The peak systolic circumferential strain (C-s) was measured from 6 circumferential points related to 6 standard segments in the inner and outer layers. Results: The C-s values of the inner layers showed higher than those of the outer layers at 6 myocardial segments (P<0.01), especially in anteroseptal, lateral, inferior and septal segments (P<0.0001). Moreover, high correlation could be found between the C-s values of inner and outer layers and peak dp/dt. Conclusion: The two dimensional speckle tracking technique, independent of insonation angle, is unique as it allows one to study the regional myocardial systolic function of circumferential direction.
Original language | English (US) |
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Pages (from-to) | 1267-1269 |
Number of pages | 3 |
Journal | Chinese Journal of Medical Imaging Technology |
Volume | 23 |
Issue number | 9 |
State | Published - Sep 2007 |
Keywords
- Circumferential
- Echocardiography
- Two dimensional speckle tracking imaging
ASJC Scopus subject areas
- Radiology Nuclear Medicine and imaging
- Physiology (medical)