Clinical and electrophysiological characteristics in patients with atrioventricular reentrant and atrioventricular nodal reentrant tachycardia. |
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Authors: | N Bottoni C Tomasi P Donateo G Lolli N Muià F Croci D Oddone C Menozzi M Brignole |
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Institution: | Unità Operativa di Cardiologia Interventistica, Dipartimento di Cardiologia, Azienda Ospedaliera S. Maria Nuova, Reggio Emilia, Italy. bottoni.nicola@asmn.re.it |
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Abstract: | AIM: To compare clinical, electrophysiological characteristics and transcatheter ablation results between two groups of patients, one with atrioventricular reentrant tachycardia (AVRT) and the other with atrioventricular nodal reentrant tachycardia (AVNRT). METHODS: The study population consisted of 94 consecutive patients who underwent endocavitary electrophysiological study and radiofrequency (RF) ablation: 46 patients had AVRT due to an accessory pathway with only retrograde conduction while 48 patients had AVNRT. RESULTS: In relation to general and clinical characteristics, differences between the two groups emerged regarding the age of symptom onset (25+/-16 vs 37+/-17 years, p=0.001), the prevalence of heart disease (8 vs 31%, p=0.001) and the correct diagnosis on surface ECG (50 vs 79%, p=0.001). Clinical presentation was quite similar apart from a higher prevalence of fatigue and sweating in the AVNRT group. Transcatheter RF ablation therapy results were similar. CONCLUSIONS: Patients with AVRT have a lower mean age at arrhythmia symptom onset compared with those with AVNRT and have fewer associated cardiac abnormalities. Clinical presentation is quite similar as well as their outcome after ablation. A correct diagnosis by standard ECG is more frequent in AVNRT. |
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Keywords: | Paroxysmal supraventricular tachycardia cardiac electrophysiology transcatheter radiofrequency ablation atrioventricular reentrant tachycardia atrioventricular nodal reentrant tachycardia |
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