Infranodal type 1 second-degree AV block is a rare finding that often predicts progression to complete heart block and requires pacing, highlighting the diagnostic value of EP studies and stress testing.
Rare type 1 AV block may signal infranodal disease requiring pacing; case reports leave open prevalence and guideline updates.
We present a case that demonstrates the rare occurrence of type 1 second-degree atrioventricular block (Wenckebach or Mobitz type 1 block) as a result of block in the infranodal conduction system. This extremely rare occurrence often predicts progression to complete heart block and necessitates cardiac pacing. It also demonstrates the value of an electrophysiological study and exercise stress testing to identify the level of block, predict prognosis, and plan a management strategy.
No takes yet. Share an insight, caveat, or question.
Tandon et al. (2011) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: