Intrinsic electrophysiology of heart

This video covers the entire topic of intrinsic control of the heart. First part deals with the assembly of conduction system of the heart. Later part discusses how the membrane potential is generated in nodal cells and contractile cells. Timeline 0:00 Introduction 0:38 Automaticity of heart 1:57 Types of myocardial cells 4:00 Nodal cells 4:39 SA node 6:12 Bachmann bundle 7:27 Internodal pathway 8:13 AV node 12:40 Bundle branches 13:15 Purkinje fibers 13:41 Flow of conduction system 15:47 Internal physiology of nodal cells and contractile cells 22:46 Gap junctions 27:30 Membrane potential of contractile cells 32:33 Plateau phase 37:00 Contraction of cells 40:00 Function syncytium