Demonstration of entrainment in a case of adenosine-sensitive focal atrial tachycardia near the His-bundle

Adenosine-sensitive focal atrial tachycardia (AT) has been shown to originate in the confined area near the His-bundle. While several pieces of evidence support focal reentry as the primary underlying mechanism, few studies have clearly demonstrated entrainment. In this report, we present a case of adenosine-sensitive focal AT by focal reentry, wherein we were able to obtain clear evidence for entrainment.