title: Analogue computation of indices of contraction from regional measurements in intact hearts.
abstract: Computation of indices of regional myocardial contractility such as the shortening, or the work done by or on a segment of myocardium in a single cardial cycle is tedious to perform manually, and complex interfacing and software is needed for digital computation. We describe the principles of an on-line, analogue device to perform these computations . The accuracy of the machine is demonstrated, and examples of the uses of the devices are given.
mesh_terms: D000818:Animals; D002309:Cardiology / Q000295:instrumentation*; D003202:Computers, Analog / Q000295:instrumentation; D004581:Electronics; D009200:Myocardial Contraction; D009862:Online Systems / Q000295:instrumentation; D013552:Swine