• Heart innervation • 12 Lead EKG (ECG) Eindhoven’s triangle • Conduction system of the heart 1 • Conduction system of the heart 2 • 12 Lead EKG electrode positions • P,Q,R,S,T waves in the EKG • ECG (EKG), Sinus rhythm and abnormalities • Sinus rhythm, bradycardia and tachycardia