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Tachycardia-induced cardiomyopathy long after a pacemaker implantation for the treatment of unusual 2:1 atrioventricular block: What is the mechanism? 

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Presentation on theme: "Tachycardia-induced cardiomyopathy long after a pacemaker implantation for the treatment of unusual 2:1 atrioventricular block: What is the mechanism? "— Presentation transcript:

1 Tachycardia-induced cardiomyopathy long after a pacemaker implantation for the treatment of unusual 2:1 atrioventricular block: What is the mechanism?  Akinori Sairaku, MD, Yukiko Nakano, MD, Yasuki Kihara, MD  HeartRhythm Case Reports  Volume 2, Issue 1, Pages (January 2016) DOI: /j.hrcr Copyright © 2016 Heart Rhythm Society Terms and Conditions

2 Figure 1 A: An electrocardiogram recorded at the patient’s initial clinical visit. A 2:1 atrioventricular block was noted. B: A long-duration recording of an electrocardiogram at the initial clinical visit. The RR intervals were irregular during 2:1 atrioventricular block. HeartRhythm Case Reports 2016 2, DOI: ( /j.hrcr ) Copyright © 2016 Heart Rhythm Society Terms and Conditions

3 Figure 2 A: A device interrogation illustrating an event of an atrial arrhythmia with a cycle length of 240–280 milliseconds and irregular atrioventricular conductions. B: A device interrogation illustrating an event of an atrial arrhythmia with 1:1 atrioventricular conductions. C: A summary of the duration of the atrial tachycardia (AT)/atrial fibrillation (AF) burden and average or maximum heart rate during the AT/AF. D: The time course of the thoracic impedance. HeartRhythm Case Reports 2016 2, DOI: ( /j.hrcr ) Copyright © 2016 Heart Rhythm Society Terms and Conditions

4 Figure 3 An intracardiac recording during atrial pacing. Wenckebach periodicity was seen at an atrial pacing cycle of 720 milliseconds. HeartRhythm Case Reports 2016 2, DOI: ( /j.hrcr ) Copyright © 2016 Heart Rhythm Society Terms and Conditions

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