Describing the Pumping Heart as a Pressure Source

✍ Scribed by M. DANIELSEN; J.T. OTTESEN

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 287 KB
• Volume: 212
• Category: Article
• ISSN: 0022-5193
• DOI: 10.1006/jtbi.2001.2348

✦ Synopsis

The pumping heart is described by a new mathematical approach which considers the heart as a pressure source depending on time, volume and #ow. This new approach allows a separation between isovolumic (non-ejecting) and ejecting heart properties. The computed results cover most of the features of the human ventricle during normal and altered vascular conditions. It is shown that the time-varying elastance concept is disquali"ed as an independent description of the heart, it follows from isovolumic heart properties and an ejection e!ect which consists of positive and negative e!ects of ventricular blood ejection.