A 58 year old man is admitted for an inferior wall myocardial infarction. On hospital day 1 he develops episodic dizziness. Telemetry shows progressive prolongation of the PR interval until a QRS complex is dropped, after which the cycle repeats. Which of the following is the most likely site of conduction delay?
- A)Purkinje fibers
- B)Bundle of His
- C)Sinoatrial node
- D)Right bundle branch
- E)Atrioventricular nodeGABARITO
Explicação
Atrioventricular node is correct. Mobitz type I second degree AV block, also called Wenckebach, is characterized by progressive PR prolongation before a dropped beat and usually reflects AV nodal conduction delay. It can be seen in increased vagal tone or infe... Ver explicação completa e trilha adaptativa →