third degree interatrial block

hospital heart rate conduction disorder bachmann bundle wave interatrial block right atrium left sinoatrial node atrioventricular system internodal pathway cardiogram electrocardiogram cardiac electrical activity amplitude graph graphic myocardium depolarization electrocardiogram monitoring ecg segment electrocardiograph healthy beat cardiac cardiology diagnosis disease ecg education ekg theory health heart heartbeat medical medicine qrs rhythm ventricle chest leads impulse human