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Digital storage and review is now the state of the art in echocardiography, and practitioners are urged to move quickly to an all-digital solution in their laboratories. Although secondary digitization from videotape may be an acceptable transitional solution, the ultimate benefits of the digital laboratory can only be achieved with direct digital output(More)
Acquisition, interpretation, and storage of digital echocardiographic images has many advantages over the standard videotape-based method. Archival, transmission, and comparative interpretation are all optimized with digital echocardiography. A study performed at one site can be immediately available for viewing and analysis at another site by means of(More)
In 1992, the American Society of Echocardiography published a report of the Sonographer Education and Training Committee's recommendations for education of sonographers who perform echocardiographic procedures. Since the publication of the original document, there has been continual progress in technology with the development of more sophisticated(More)
The impact of contrast agents (transpulmonary and agitated saline) on the clinical applications of echocardiography has been dramatic over the last decade.Currently, the Food and Drug Administration– approved indications for transpulmonary agents include the enhancement of left ventricular endocardial border definition.The augmentation of Doppler signals(More)
Executive Summary Echocardiography is an invaluable diagnostic tool for the evaluation of cardiac form, and function. Evaluation of the cardiac form and function requires highly skilled acquisition given that the technique of performing the examination has become increasingly sophisticated. While there exists several publications relating to the role and(More)
OBJECTIVES This study was designed to noninvasively assess the direct action of calcium channel blockers on left ventricular contractility in humans and to establish a framework for determining the importance of reflex sympathetic responses to any pharmacologic intervention. BACKGROUND Assessment of left ventricular contractility in patients taking(More)
AIMS Visual analysis of ejection fraction by echocardiography (echo) is commonly performed, but little data exists regarding consistency among interpreters. We postulate that an active echo group evolves a standard to which interpreters cluster, with variation or 'drift' occurring at satellite sites distant from the main practice centre. Assuming that echo(More)
Histamine has a positive inotropic action in humans. Recent controversial data have suggested that histamine2 (H2) receptor blockade depresses overall left ventricular systolic performance in healthy volunteers. To explore the possibility that H2 receptors positively influence basal left ventricular contractile tone, 10 normal subjects were studied by using(More)