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