ELECTROMYOGRAPHY FOR CARDIOMYOPLASTY WITH INTRA—MUSCULAR ELECTRODE USING UNCONDITIONED SKELETAL MUSCLE DURING GRADED FATIGUE BYFREQUENCY CHANGE OF ELECTRICAL STIMULATION

Abstract

Usefulness of electromyography (EMG) to monitor fatigue of latissimus dorsi muscle (LDM) for cardiomyoplasty was investigated in an animal study. After Cardiomyoplasty, the monitoring of LDM fatigue independently from myocardium is necessary to control conditions of LDM pacemaker. Graded fatigue of canine LDM after vascular delay without electrical preconditioning were obtained by frequency change of electrical stimulation for ten minute driving. During electrical stimulation EMG was recorded with intramuscular platinum electrodes and studied by a signal processor. Patterns and parameters of EMG were significantly different, depending on graded fatigue of LDM.