Matching Pairs CVS Heart: Cells & ECGOnline version Pacemaker, Contractile cells & ECG by Dr MAHABOOB KHAN SULAIMAN 1 Funny current 2 Ventricular repolarization 3 Contractile cells 4 Auto-rhythmic 5 Pacemaker Cells 6 Plateau phase 7 Atrial depolarization 8 Ventricular depolarization 9 Non auto-rhythmic cells with long refractory period T wave 99% cells with true resting potential P wave QRS wave called pacemaker potential, Ca 'T' type channels open Contractile cells characteristic of contractile cells, slow Ca channels open 1% of cells with no true resting potential Pacemaker cells