Marked First Degree AV Blockとは？

Marked First Degree AV Block

１度房室ブロックの中でもPR間隔が0.30秒以上の場合はMarked First Degree AV Blockと定義されています(1

1)Marked First Degree Atrioventricular Block: an extremely prolonged PR interval associated with Atrioventricular Dissociation in a young Nigerian man with Pseudo-Pacemaker Syndrome: a case report. BMC Res Notes. 2014 Nov 4;7:781.