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Module title = Tutorial: Bundle Branch Blocks
Lesson title = Incomplete blocks
This is lesson 6 of 8 in this module
Incomplete bundle branch blocks essentially
share the same diagnostic criteria
as complete bundle branch blocks with one difference: the
QRS duration is shorter
with incomplete blocks.
Remember that the QRS duration for complete blocks is > 120 ms (3 little squares). The QRS duration diagnostic criteria for incomplete bundle branch blocks is
100 - 120 ms.
(which is 2.5 - 3 little squares).
Different textbooks might reference different QRS durations.
Here is an example of incomplete LBBB:
With close-ups of V
1
and V
6
:
Here is an example of incomplete RBBB:
With close-up looks at V
1
and V
6
:
Lesson 6 of 8
That was the last lesson!
