CARDIAC ELECTRICAL ACTIVITY-CONDUCTION SPEEDS
From NeuroRehab.wiki
SUMMARY
1. SA node: 0.05 m/s
2. Atrial internodal pathways: 1 m/s
3. AV node: 0.05 m/s
4. Bundle of His: 1 m/s
5. Purkinje fibres: 4 m/s
6. Ventricular muscle: 1 m/s
Note: conduction speed is different frompacemaker potential. Various parts of the conduction system & myocardium are capable of spontaneous rhythmical discharge but the SA node discharges most rapidly, hence is the cardiac pacemaker.
Reference(s)
Barrett, K.E., Barman, S.M., Brooks, H.L., X, J. and Ganong, W.F. (2019). Ganong’s review of medical physiology. 26th ed. New York: Mcgraw-Hill Education
