The concept of health: Beyond normativism and naturalism

Philosophical discussions of health and disease have traditionally been dominated by a debate between normativists, who hold that health is an inescapably value-laded concept and naturalists, such as Christopher Boorse, who believe that it is possible to derive a purely descriptive or theoretical definition of health based upon biological function. In this paper I defend a distinctive view which traces its origins in Aristotle\u27s naturalistic ethics. An Arisotelian would agree with Boorse that health and disease are ubiquitous features of the natural world and thus not mere projections of human interests and values. She would differ from him in rejecting the idea that value is a non-natural quality. I conclude my discussion with some comments of the normative character of living systems

Contrast-Enhanced Ultrasound for Myocardial Perfusion Imaging

Ultrasound contrast agents are gas-filled microbubbles that enhance visualization of cardiac structures, function and blood flow during contrast-enhanced ultrasound (CEUS). An interesting cardiovascular application of CEUS is myocardial contrast echocardiography, which allows real-time myocardial perfusion imaging. The intraoperative use of this technically challenging imaging method is limited at present, although several studies have examined its clinical utility during cardiac surgery in the past. In the present review we provide general information on the basic principles of CEUS and discuss the methodology and technical aspects of myocardial perfusion imaging