Fig. 1From: A comparative review on heart ion channels, action potentials and electrocardiogram in rodents and human: extrapolation of experimental insights to clinicA Schematic representation of the excitatory and conductive system of the heart and the time of impulse appearance (In hundredths of a second after starting at the SA node) in different parts of the heart. SA; sinoatrial, AV; atrioventricular, RA; right atrial, LA; left atrial, RV; right ventricle, LV; left ventricle. B cardiac fast and slow action potentials and different phases. C A normal electrocardiogram where P and T waves, QRS complex, intervals and segments are shown. ERP; effective refractory period, RRP; relative refractory periodBack to article page