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Whole muscle length-tension relations were equated with sarcomere-length-tension relations by fixation of muscle at a particular point on the curve and determination of sarcomere length by electronmicroscopy.
1. The contribution of myofibrillar properties to the sarcomere length-force relationship of cardiac muscle.- Appendix (Sarcoplasmic reticulum calcium release).- 2. The mechanism of the length-tension relation in cardiac muscle of Rana Catesbeiana.- 3. Intracellular calcium concentration following length changes in mammalian cardiac muscle.- 4. Some dynamic effects of length and isotonic motion on cardiac sarcomere shortening.- 5. The relation between contraction dynamics and the intracellular calcium transient in mammalian cardiac muscle.- 6. The effects of sarcomere length on force and velocity of shortening in cardiac muscle.- 7. Similarity and dissimilarity between muscle force-length relationship and ventricular pressure-volume relationship.- 8. The importance of the geometry of the heart to the pump.- 9. Cardiac pump function and ventricular dimensions.- 10. The pressure-volume relationship of the intact heart.- Index of Subjects.