Second-degree interatrial block: A case series

Resumption of interatrial conduction after atrial premature beat in baseline interatrial aberrancy

“…The P‐R and P‐P intervals that followed the pause presented the same duration as the previous intervals. This type of blockage has been recently published, but is typically the pattern of an A‐IAB that appears again (Bayés de Luna, Baranchuk, et al., 2018 ; Wang et al., 2019 ). This is not what was observed in this patient case report where the P‐wave morphology remains normal in subsequent beats.…”

Interatrial block

“…Межпредсердная блокада второй степени -крайне редкий ЭКГ феномен. Описаны редкие единичные случаи улучшения или восстановления проведения импульса между предсердиями в синусовых комплексах после постэкстрасистолических пауз у лиц, наиболее вероятно, имевших функциональный блок проведения по пучку Бахмана [23].…”

Intra-Atrial Block: Definition and Relationship to Atrial Fibrillation and Other Adverse Outcomes

“…Recently, it has been shown that IAB may be provoked by adenosine; reduced by atropine;can be functional, occurring or stopping after refractory period changes associated with premature impulses; and may be associated with obstructive sleep apnea. [6,11,[2][3][4][5][6][7][8][9][10]16,17,21,22,24] Sometimes the P wave morphology can offer a clue as to possible contributors to IAB or the site of delay. For example, a left atrial enlargement pattern would suggest left heart pathology.…”