Single Plane Angiography: Current Applications And Limitations

Considerable effort has been devoted in recent years towards developing indices of myocardial performance based on the contractile geometry of the left ventricle. Beginning with the pioneer work of A.V. Hill (1), the force-velocity-length characteristics of isolated skeletal and cardiac muscle have been studied extensively (2-4). Application of this knowledge to the evaluation of the intact heart presents many problems. Angiographic measurements are subject to a variety of technical errors. In addition, there exists no exact model relating performance of the intact heart to the behavior of individual muscle fibers. The geometry of the ventricle is complex and difficult to account for accurately. Despite these difficulties, angiographic estimates of contractility are useful in evaluating myocardial performance.

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