101. Differentiation of atrial tachycardia from other long RP tachycardias by electrocardiographic characteristics
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Mihoko Kawabata, Atsuhiko Yagishita, Mitsuaki Isobe, Koji Sugiyama, Tomofumi Nakamura, Koji Higuchi, Kenzo Hirao, Tetsuo Sasano, Hitoshi Hachiya, and Yasuaki Tanaka
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lcsh:Diseases of the circulatory (Cardiovascular) system ,medicine.medical_specialty ,business.industry ,Atrial tachycardia ,medicine.disease ,lcsh:RC666-701 ,Internal medicine ,medicine ,Cardiology ,Supraventricular tachycardia ,cardiovascular diseases ,Long RP supraventricular tachycardia ,medicine.symptom ,PR interval ,Cardiology and Cardiovascular Medicine ,business - Abstract
Background: The incidence and electrocardiographic characteristics of atrial tachycardia (AT) among long RP tachycardias have not been fully elucidated. Methods and results: Thirty-six patients with 37 long RP tachycardias were classified as having AT (n=23) or non-AT (n=14). We analyzed the electrocardiographic features, including the ratio between the RP and PR intervals (RP/PR ratio), P-wave morphology, and P-wave duration. The RP/PR ratio was higher in AT than in non-AT (2.01±0.54 vs. 1.57±0.24, P96 ms. Conclusion: AT accounted for nearly two thirds of long RP tachycardias in this cohort. Electrocardiographic features, including the RP/PR ratio, polarity of the P wave, and P-wave duration were useful in the differentiation of AT.
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