Some Properties of Contractile Proteins of the Heart as Studied on the Extracted Heart Muscle Preparation
The physiologic properties of the contractile elements (actomyosin) have been studied on the extracted heart muscle of the dog. It was found that many properties of fresh heart muscle are due to inherent qualities of the contractile proteins. For example, the speed of contraction decreased with increasing loads, the work increased with rising tension up to an optimal value, and increased fiber length resulted in greater muscle work.
- Received October 1, 1952.
- © 1953 American Heart Association, Inc.