Key result
Pulse-transit ultrasound successfully measures canine LV internal dimensions, revealing phasic patterns influenced by heart rate.
Why the study?
Simultaneous measurement of pressure and internal dimension of the left ventricle and description of pressure-dimension loops are fundamental for evaluating cardiac function, but methods for this in normal canine hearts needed validation.
Simultaneous measurement of pressure and internal dimension using pulse-transit ultrasound is feasible and fundamental for evaluating cardiac function in canine models.
Answers are grounded in this paper and cite their sources.
Supports LV dimension assessment in canine models; leaves open translation to clinical cardiac evaluation.
We measured the internal minor dimension in the normal canine left ventricle using a pulse-transit ultrasonic method. In this report, we explained our methods and techniques, and analyzed the phasic patterns of the dimensional curve. We recognized that our methods and techniques were adequate to measure the internal dimension, and that its phasic patterns were similar to the other reports in the opened chest experiments. The phasic patterns of the dimensional curve were changed under the influencing of the experimental state (opened chest or concious), the site of the transducers in the endocardium and the heart rate. The simultaneous measuring of the pressure and the internal dimension of the left ventricle and the describing of its pressure-dimension loops are the fundamental for the evaluating of the cardiac function.
No takes yet. Share an insight, caveat, or question.
Fujiyama et al. (1979) studied Normal canine left ventricle (n=20). Pulse-transit ultrasonic method was evaluated on Phasic patterns of the dimensional curve and pressure-dimension loops. The pulse-transit ultrasonic method successfully measured the internal dimension of the normal canine left ventricle, revealing phasic patterns influenced by experimental state, transducer site, and heart rate.
Synapse has enriched 10 related papers. Consider them for comparative context: