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Basic studies on skeletal muscle for cardiac assistance.

J C Jarvis¹, C N Mayne, S Salmons

¹Department of Human Anatomy and Cell Biology, University of Liverpool, UK.

Journal of Cardiac Surgery

|March 1, 1991

Summary

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Electrical stimulation can make skeletal muscle fatigue resistant for circulatory assistance. New methods show high-force contractions may preserve muscle power output while improving fatigue resistance.

Area of Science:

Biomedical Engineering
Skeletal Muscle Physiology

Background:

Skeletal muscle requires electrical stimulation for fatigue resistance in circulatory assistance.
Conventional conditioning patterns can lead to reduced muscle speed and power output.

Purpose of the Study:

To investigate the chronic effects of intermittent high-frequency contractions on skeletal muscle.
To determine if high-force contractions can preserve power output while enhancing fatigue resistance.

Main Methods:

Rabbit skeletal muscle was subjected to chronic intermittent high-frequency contractions.
Stimulation protocols included high-frequency bursts alone or overlaid on a 10 Hz background.

Main Results:

High-force contractions appear to preserve power output.

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Fatigue resistance was acquired without significant compromise to power-generating capacity.

Conclusions:

Modulating impulse patterns, analogous to strength training, may avoid power reduction.
Intermittent high-frequency contractions offer a promising strategy for skeletal muscle conditioning in circulatory assistance.