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