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CHAPTER 28

Atrioventricular Blocks

Objectives

At the end of this chapter, the student should be able to:

1. Define and discuss the general term atrioventricular (AV) blocks, and discuss the spectrum of the various AV blocks according to severity. (p 412)
2. Define first-degree AV block, and list its diagnostic criteria. (pp 412–416)
3. Define Mobitz I second-degree AV block or Wenckebach, and list its diagnostic criteria. (pp 419–420)
4. Define Mobitz II second-degree AV block, and list its diagnostic criteria. (pp 429–431)
5. Define 2:1 AV block, and list its diagnostic criteria. (p 434)
6. Discuss your ability to assess whether a 2:1 block is either a Mobitz I or a Mobitz II second-degree AV block, and describe in detail the methodology you would use to obtain the correct diagnosis. (p 434)
7. Define high-grade AV block, and list its diagnostic criteria. (p 437)
8. Define the third-degree or complete AV block, and list its diagnostic criteria. (pp 439–441)
9. Compare the various forms of AV block in regard to “grouping.” (p 447)
10. List some clinical conditions or circumstances that are associated with the formation of the AV blocks. (p 447)
11. Accurately identify the different types of AV block on a rhythm strip or ECG. (pp 417–419, 426–429, 432–433, 435–436, 438, 443–446)