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23 - Recentdevelopments in Doppler imaging

from Section 2 - Practical issues in transesophageal echocardiography

Published online by Cambridge University Press:  10 May 2010

By
Heinz D. Tschernich
Edited by
Robert Feneck ,
John Kneeshaw  and
Marco Ranucci
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Summary

This chapter introduces recent developments in Doppler imaging, outlining their physical background and discussing their main areas of application and their limitations. Pulsed-wave tissue Doppler imaging (PW-TDI) is the simplest approach to data acquisition, and is available on all current cardiac ultrasound systems, during both transthoracic echocardiography (TTE) and transesophageal echocardiography (TEE) exams. Color Doppler myocardial imaging (CDMI) uses the principle of color-flow mapping to measure velocities in different directions at a reasonable frame rate. The most recent development, speckle-tracking echocardiography (STE), is derived from the standard gray-scale image. STE may be the most versatile method to measure and display myocardial function. Global longitudinal peak systolic strain (GLPSS) is calculated from the average of the peak systolic values of all LV segments. Postsystolic shortening in the longitudinal direction has been shown to be a sensitive and specific marker for myocardial ischemia.

Keywords

atrial thrombuscoronary artery bypass grafting surgeryisochemic heart diseasepatent foramen ovaletransesophageal echocardiographymyocardial ischemiamitral valve diseaseleft ventricular restoration surgery
Type
Chapter
Information
Core Topics in Transesophageal Echocardiography , pp. 368 - 396
Publisher: Cambridge University Press
Print publication year: 2010

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