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