Interatrial block and atrial arrhythmias in centenarians: Prevalence, associations, and clinical implications

Manuel Martínez-Sellés, Albert Massó-Van Roessel, Jesús Álvarez-García, Bernardo García De La Villa, Alfonso J. Cruz-Jentoft, María Teresa Vidán, Javier López Díaz, Francisco Javier Felix Redondo, Juan Manuel Durán Guerrero, Antoni Bayes-Genis, Antonio Bayes De Luna

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© 2016 Heart Rhythm Society. All rights reserved. Background Data are lacking on the characteristics of atrial activity in centenarians, including interatrial block (IAB). Objective The aim of this study was to describe the prevalence of IAB and auricular arrhythmias in subjects older than 100 years and to elucidate their clinical implications. Methods We studied 80 centenarians (mean age 101.4 ± 1.5 years; 21 men) with follow-ups of 6-34 months. Of these 80 centenarians, 71 subjects (88.8%) underwent echocardiography. The control group comprised 269 septuagenarians. Results A total of 23 subjects (28.8%) had normal P wave, 16 (20%) had partial IAB, 21 (26%) had advanced IAB, and 20 (25.0%) had atrial fibrillation/flutter. The IAB groups exhibited premature atrial beats more frequently than did the normal P wave group (35.1% vs 17.4%; P <.001); also, other measurements in the IAB groups frequently fell between values observed in the normal P wave and the atrial fibrillation/flutter groups. These measurements included sex preponderance, mental status and dementia, perceived health status, significant mitral regurgitation, and mortality. The IAB group had a higher previous stroke rate (24.3%) than did other groups. Compared with septuagenarians, centenarians less frequently presented a normal P wave (28.8% vs 53.5%) and more frequently presented advanced IAB (26.3% vs 8.2%), atrial fibrillation/flutter (25.0% vs 10.0%), and premature atrial beats (28.3 vs 7.0%) (P <.01). Conclusion Relatively few centenarians (<30%) had a normal P wave, and nearly half had IAB. Our data suggested that IAB, particularly advanced IAB, is a pre-atrial fibrillation condition associated with premature atrial beats. Atrial arrhythmias and IAB occurred more frequently in centenarians than in septuagenarians.
Original languageEnglish
Pages (from-to)645-651
JournalHeart Rhythm
Issue number3
Publication statusPublished - 1 Mar 2016


  • Atrial fibrillation
  • Bayes syndrome
  • Centenarian
  • Interatrial block

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