Mobitz type II delay. « metajournal.com

American heart journal · Nov 1988

Case Reports

Mobitz type II delay.

Mobitz type II second-degree block manifests with several consecutive impulses conducted with a constant conduction time that are followed by block. This study reflects an entirely new concept of the Mobitz type II phenomenon, wherein consecutive impulses have constant conduction times, but instead of being followed by a block of conduction, are in fact followed by a conduction delay. ⋯ The recognition of this manifestation at the sinoatrial junction is suggested when, during regular sinus rhythm with manifest episodes of Mobitz type II sinoatrial block, the sinus rhythm is at times also complicated by a sudden unexpected prolongation of a P-P interval, which is followed by an shortened P-P interval. This new phenomenon is termed by Mobitz type II delay.

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- G Oreto, F Luzza, G Satullo, and L Schamroth.
- Istituto Pluridisciplinare di Clinica Medica, Università di Messina, Italy.
- Am. Heart J. 1988 Nov 1; 116 (5 Pt 1): 1239-47.
AbstractMobitz type II second-degree block manifests with several consecutive impulses conducted with a constant conduction time that are followed by block. This study reflects an entirely new concept of the Mobitz type II phenomenon, wherein consecutive impulses have constant conduction times, but instead of being followed by a block of conduction, are in fact followed by a conduction delay. The diagnosis of this manifestation at the atrioventricular (AV) junction is made by the appearance of an unexpected prolonged PR interval followed by a shorter PR interval. The recognition of this manifestation at the sinoatrial junction is suggested when, during regular sinus rhythm with manifest episodes of Mobitz type II sinoatrial block, the sinus rhythm is at times also complicated by a sudden unexpected prolongation of a P-P interval, which is followed by an shortened P-P interval. This new phenomenon is termed by Mobitz type II delay.

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Mobitz type II delay.

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