Diagnostic dilemma with a narrow QRS regular rhythm at normal rates in a patient with corrected transposition of great arteries |
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Authors: | Jayaprakash Shenthar Maneesh K Rai |
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Institution: | Electrophysiology Unit, Department of Cardiology, Sri Jayadeva Institute of Cardiovascular Sciences & Research, Bannerghatta Road, Jayanagar 9th Block, Bangalore 560069, Karnataka, India |
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Abstract: | A 35 year old male, known case of corrected transposition of great arteries presented with exertional dyspnea and recurrent pre-syncope. 12 lead electrocardiogram revealed a regular rhythm at 75 beats per minute, P waves occurring on the upstroke of T waves and apparent 1:1 P-QRS relationship. The possibilities to be considered – complete AV block with junctional escape, junctional rhythm with 1:1 retrograde conduction, junctional rhythm with isorhythmic AV dissociation and prolonged PR interval have been discussed. |
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Keywords: | Junctional rhythm AV dissociation Prolonger PR interval First degree AV block |
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