anti-arrhythmiaagents arrhythmia arrhythmiapathophysiology arrhythmiaphysiopathology arrhythmias atrialfunction cardiac cardiacelectrophysiology chemotherapy clinicalmedicine congresses diseases drugtherapy electrocardiography electrophysiologictechniques electrophysiology evidence-basedmedicine fitness general health heartconductionsystem heartphysiology internalmedicine medical methods pathophysiology pharmacology qv150c64171983