The electrophysiology laboratory * The basic electrophysiology study * Atrial arrhythmias * Dual AV nodal pathways and AV nodal re-entry * Accessory pathways and AV re-entry * Differential diagnosis of supraventricular tachycardias * Ventricular tachycardia in the electrophysiology laboratory * Mapping and catheter ablation * A general approach to the electrophysiology study