Key result
Ultrasonic integrated backscatter matches radionuclide and dobutamine imaging for predicting post-reperfusion recovery.
Why the study?
Ultrasonic tissue characterization uses myocardial integrated backscatter analysis to determine contractile performance and myocardial viability independent of wall motion, prompting a review of recent clinical findings regarding its application.
Does ultrasonic tissue characterization using myocardial integrated backscatter accurately assess myocardial viability and predict functional recovery after coronary reperfusion compared to standard imaging modalities?
Does ultrasonic tissue characterization using myocardial integrated backscatter accurately assess myocardial viability and predict functional recovery after coronary reperfusion compared to standard imaging modalities?
Ultrasonic tissue characterization using integrated backscatter provides non-invasive assessment of myocardial viability and post-reperfusion functional recovery comparable in accuracy to dobutamine echocardiography and radionuclide imaging.
Answers are grounded in this paper and cite their sources.
May offer bedside viability assessment post-reperfusion; leaves open prospective validation against standard modalities.
PURPOSE OF REVIEW: Ultrasonic tissue characterization is a non-invasive diagnostic method that uses myocardial integrated backscatter analysis to determine contractile performance and myocardial viability independent of wall motion. This review discusses recent clinical findings regarding the application of ultrasonic tissue characterization for the assessment of myocardial viability. RECENT FINDINGS: As this technique is non-invasive, ultrasonic tissue characterization can be used to predict the patency of infarct-related arteries in patients in the early stage of acute myocardial infarction. Several recent studies have shown that this technique is useful in identifying myocardial contractile reserve. The accuracy of ultrasonic tissue characterization for predicting functional recovery after coronary reperfusion is comparable to dobutamine echocardiography and radionuclide methods. Several studies have suggested that the cyclic variation of myocardial integrated backscatter reflects myocardial viability rather than contractile reserve. The cyclic variation of integrated backscatter is associated with myocardial viability confirmed by the integrity of the microvasculature identified by contrast echocardiography. In addition, the cyclic variation of integrated backscatter better reflects myocardial viability confirmed by the integrity of cellar metabolism than contractile reserve. SUMMARY: Ultrasonic tissue characterization with integrated backscatter is a useful non-invasive method that can provide unique information for the assessment of myocardial viability.
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Yamada et al. (2006) conducted a review in Acute myocardial infarction / myocardial viability. Ultrasonic tissue characterization with myocardial integrated backscatter analysis vs. Dobutamine echocardiography, radionuclide methods, and contrast echocardiography was evaluated on Assessment of myocardial viability and prediction of functional recovery after coronary reperfusion. Ultrasonic tissue characterization with integrated backscatter predicts post-reperfusion functional recovery with accuracy comparable to dobutamine echocardiography and radionuclide methods.
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