Bundle Branch Block Determination II ECG Interpretation #320


Steps 1-3

Changes specifically seen include the QRS complex measuring 0.12 seconds or greater due to this delay. When determining the presence of BBB there are just a few simple steps to follow.

  • Step 1: Refer to lead V1
  • Step 2: Look for evidence that the electrical activity started above the ventricles (P wave). This is sometimes referred to as supraventricular activity.
  • Step 3: QRS complex measures 0.12 seconds or greater (not including aberrant complexes i.e. PVCs)

Steps 1-3 (continued)

By following the previous three steps, you will be able to determine whether a BBB is present or not.

Now it is simply a matter of one more step when analyzing the QRS in V1 to distinguish whether it is a left BBB or a right BBB.




Authors and Sources

Authors and Reviewers


Sources




? onAr:0 | v:0 | onPs:2
pu? False | pv:1
pLen: 0 | nLen 1 | cCode:
| debug: | debugCtr: 0 | localNlen: 1;





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