• Case 2: A 70 year old man with supraventricular tachycardia for years. The first tracing was then while the patient was in the hospital and was recorded via telemetry. This is the initiation of spontaneous A/V nodal reentry tachycardia (AVNRT).
  The second tracing was recorded in the electrophysiology laboratory and shows the initiation of AVNRT with ventricular stimulation. Compare this to the spontaneous event.
  The third tracing was recorded in the electrophysiology laboratory and shows termination of the AVNRT with ventricular pacing.
  One way of determining if a supraventicular arrhythmia is AVNRT is to compare the depolarization sequence of the left atrium from a coronary sinus recording . The left atrium depolarizes from the area of the AV node to the distal CS both in sinus rhythm and AVNRT tachycardia.
• Case 3: tracings of an ablation for atrial flutter
• Case 4: tracings from a patient with dual A/V nodal pathways, the recording of the fast pathway potential and the ablation of this pathway with radio frequency energy.
• Case 5: tracings from a patient with a lateral accessory pathway, with a tracing during ablation.
• Case 6: Recordings from a patient with AVRT before and after the ablation of a left latteral pathway.