ISSN:
1435-1803
Keywords:
intramyocardial pressure
;
canine
;
methodology
;
mechanics
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Summary We critically evaluated the major techniques for measurement of intramyocardial pressure (IMP (closed, perfusion, open, microtransducer). Each technique demonstrates a gradient in systolic IMP increasing with depth from the epicardium. The estimated magnitude of this gradient varies with the technique employed. Indirect methods (closed, perfusion) estimate a higher value for the systolic IMP gradient. The open and microtransducer methods, which measure a direct hydrostatic pressure within the myocardium, are less invasive and reflect more reliably the magnitude of IMP. The results for the open and microtransducer methods were comparable and indicate that normalized systolic IMP increases linearly from the epicardium. In the inner half of the myocardium systolic IMP approaches the level of systolic LVP and in the subendocardial layer it exceeds the systolic LVP by about 8%. A reverse IMP gradient occurred in late diastole ranging from 5 mm Hg in the subendocardial region K 25 mm Hg in the subepicardium.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01935811
Permalink
