Yontar O.C.,Bursa Postgraduate Training and Research Hospital |
Karaagac K.,Bursa Postgraduate Training and Research Hospital |
Tenekecioglu E.,Bursa Postgraduate Training and Research Hospital |
Tutuncu A.,Bursa Postgraduate Training and Research Hospital |
Melek M.,Bursa Postgraduate Training and Research Hospital
Experimental and Clinical Cardiology | Year: 2014
Aim: Atrioventricular nodal reentrant tachycardia (AVNRT) is the most common subgroup of regular narrow QRS tachycardias. There are two types of AVNRT, namely common and uncommon. Aim of this study is to evaluate resting electrocardiograms of these patients, define the most frequent findings and search whether there is a relationship between AVNRT subtypes and particular ECG deviations. Methods: The most frequently encountered ST and T wave abnormality on twelve-lead resting sinus rhythm ECG were classified according to location as 1) DII-III and aVF, 2) DI and aVL, 3) V4-6 leads. Negative T wave and/or≥mm ST depressions were accepted as deviations. Results: Patients with common AVNRT had abnormality mostly on DII-III and aVF (75%, n=21/28) while uncommon group rather had on DI and aVL derivations (80%, n=16/20). Linear regression analysis showed that, among all other variables (age, sex, hypertension and diabetes) only ECG abnormality subtype was an independent predictor for discriminating typical from atypical AVNRT. Conclusion: Common AVNRT seems to be associated with ST segment and/or T wave deviations on II-III-aVF derivations whereas uncommon AVNRT is more likely associated with I and aVL (p=0,000). We suggest that particular ECG deviations on particular leads may provide clues about certain diagnosis in patients without documented tachycardia who are planned for electrophysiological testing.