Shortening of ventriculoatrial interval after ablation of an accessory pathway

Alasti, Mohammad; Alizadeh, Abolfath; Haghjoo, Majid; Emkanjoo, Zahra and Sadr-Ameli, Mohammad Ali (2006) Shortening of ventriculoatrial interval after ablation of an accessory pathway. Indian Pacing and Electrophysiology Journal, 6 (4). pp. 244-248. ISSN 0972-6292

This is the latest version of this eprint.

Full text available as:

PDF - Requires Adobe Acrobat Reader or other PDF viewer.
302 Kb


A 21-year old man with history of 8 year palpitation was referred for electrophysiologic study and possible radiofrequency ablation. Physical examination and transthoracic echocardiographic study did not disclose any abnormality. Baseline ECG showed normal sinus rhythm with normal PR and QRS intervals and no evidence of preexcitation. Antiarrhythmic drugs (propranolol and verapamil) were discontinued two days before the procedure. Baseline intervals in sinus rhythm were as follows: sinus cycle length=690 msec, AH=74 msec, HV=37 msec, QRS=90 msec, PR=133 msec. The minimal pacing cycle length maintaining 1:1 antegrade conduction (AVWP) was 320 msec and the minimal pacing cycle length maintaining 1:1 retrograde conduction (VAWP) was 400 msec. Single extrastimulus testing in the right atrium and the right ventricular apex leaded to a sustained narrow complex tachycardia. The arrhythmia was a short PR- long RP tachycardia with following characteristics: cycle length=376 msec, AH=141 msec, HV=42 msec, VA=200 msec, HA (HRA) =236 msec, HA (His) =243 msec and eccentric atrial activation during the arrhythmia (Figure 1). The arrhythmia was easily reproducible with stable hemodynamic.

EPrint Type:Article
Uncontrolled Keywords:Ablation, Short PR-long RP Tachycardia, Slowly Conducting Accessory Pathway, Arrhythmia, Antiarrhythmic Drugs, Verpamil, Propranolol
Subjects:Organic Chemicals > Amines > Amino Alcohols
Organic Chemicals > Alcohols > Amino Alcohols
-Journal Repositories > Indian Pacing and Electrophysiology Journal
Organic Chemicals > Amines > Ethylamines
Cardiovascular Diseases > Heart Diseases > Arrhythmia > Tachycardia
Cardiovascular Agents > Anti-Arrhythmia Agents
Polycyclic Hydrocarbons > Polycyclic Hydrocarbons, Aromatic > Naphthalenes
Cardiovascular Diseases > Heart Diseases > Arrhythmia
Therapeutics > Cardiac Pacing, Artificial
Pathological Conditions, Signs and Symptoms > Pathologic Processes > Arrhythmia
ID Code:2301
Deposited By:Indian Pacing and Electrophysiology Journal
Deposited On:29 August 2007

Available Versions of this Item

Archive Staff Only: edit this record