Elasticity, definition

To maximize the numbers and kinds of potential employers presented here and in preceding chapters, this book uses a broad, elastic definition of the pharmaceutical industry. In one sense, however, the present index is not complete, for it makes no effort to specify the many other kinds of companies that employ organic chemists. These scientists and other kinds of chemists find work in perfumeries, for example, and in animal-health and agricultural chemical firms. Readers interested in seeking work there can use the same methods for finding openings that they bring to a search for jobs in the human pharmaceutical industry. 

At/AVy in the second term of the right-hand side is equal to —l/Qy, inverse ejection outflow. Consequently, elastance definitions such as Equation 8.2 and Equation 8.3 are not measures purely of ventricular elastance but also include arterial effects. This may explain why suchmodels have difficulty in accurately predicting flow [8]. Consequently, a new measure of the heart s mechanical properties was developed. 

This ventricle model permits computation of ventricular elastance, and may resolve difficulties with previous time-varying elastance definitions. Work is currently underway to devise a new measure of cardiovascular health using this model. In essence, it is thought that the magnitude of the observed ejection effect for a particular heart should be directly related to its health. 

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