933 Schematic representation of the heart and normal Jussy cardiac electrical activity(intracellular recordings from areas indicated and EcG) Phase 0 SA node Slow response AV node Phase Fast Tricuspid Resting potential response Mitral Ventricle ntial phases ECG 200msSchematic representation of the heart and normal cardiac electrical activity (intracellular recordings from areas indicated and ECG). Slow response Fast response ECG