To study clinical and electrophysiological characteristics in patients with atrioventricular reentrant and atrioventricular nodal reentrant tachycardia

摘要

Background: Atrioventricular nodal reentrant tachycardia(AVNRT)and atrioventricular reentrant tachycardia(AVRT)representabout 90% of supraventricular tachycardias.The aim of thisstudy is to assess and compare clinical and electrophysiological(EP) profile in patients of AVNRT and AVRT.Methods: The study population consisted of 76 patients diagnosedto have AVNRT (n?44), AVRT (n?32) during study period whounderwent EP study and RFA.Results: Mean age of the population with AVNRT was46.9±12.3yrs.There were 26 (59.1%) males and 18(40.9%)females.Mean age of onset of AVNRT was 43±13.3yrs.Palpitations(100%) was the most common symptom in patients of AVNRTfollowed by chest pain (27.3%). Structural heart disease was presentin 5 (11.4%) patients of AVNRT. In 18 (40.9%)patients ofAVNRT, AH jump was seen. Mean Cycle Length (CL) was769.5±124.3 ms, mean AH interval was 69.1±20.7 ms, mean HVinterval was 40.3±9.1 ms. Transient AV block after RFA occurred in2 patients of AVNRT which recovered spontaneously.Relapseoccurred in 3 patients over a follow up period of 12 months.Meanage of the population with AVRT was 40+/-12.8 yrs.There were 17(53.1 %) males and 15 (46.9 %) females.Mean age of onset of AVRTwas 36.8±14 yrs. Palpitations (96.9%) was the most commonsymptom in patients of AVRT followed by chest pain (31.3%).Structural heart disease was present in 6 (18%) patients.AVRTwith concealed accessory pathway was seen in 12 patients (37.5%).Left lateral pathway (34.4%) was the most common pathwaypresent followed by right postero septal pathway (18.6%).Conclusion: Patients with AVRT have a lower mean age ofsymptom onset compared with those with AVNRT.Clinical presentationwas quite similar in both the groups.There was no significantdifference in average number of burns used for RFA inboth the groups.Complications like transient AV block were seenmostly in AVNRT patients.There was no significant difference inoccurrence of relapse in patients of AVNRT and AVRT.