Abstract
The use of a biplane x-ray technique and a metabolically-supported isolated canine left ventricle preparation (with an artificial circuit, independent control of aoretic, atrial, and coronary perfusion pressures, as well as heart rate) provides an angiographically ideal means of measuring mechanical dynamics of the myocardium while the intact left ventricular myocardial structure and electrical activation pattern retains most of the in situ ventricular characteristics. An angiographic technique is used because the transmission of roentgen rays through the heart produces roentgen projections over extended periods of time with high temporal and spatial resolution and is noninvasive in that the rays do not directly affect the function of the cardiac system at the dose levels required to produce useful images. Television techniques are used for recording the angiographic images because this greatly facilitates their very rapid and direct conversion into digital form by high-fidelity digital conversion of the video signals. The tremendous capability of digital computers to handle the high data rates, data volumes, and numbers of calculations is, thereby, readily applied.
| Original language | English (US) |
|---|---|
| Pages | 129-137 |
| Number of pages | 9 |
| State | Published - 1975 |
| Event | Cardiovasc Imaging and Image Process, Theory and pract $—$ 1975 - Stanford, CA, USA Duration: Jul 10 1975 → Jul 12 1975 |
Conference
| Conference | Cardiovasc Imaging and Image Process, Theory and pract $—$ 1975 |
|---|---|
| City | Stanford, CA, USA |
| Period | 7/10/75 → 7/12/75 |
ASJC Scopus subject areas
- General Engineering