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Intraventricular Conduction

No change in size, 03:58, 18 January 2010
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== LBBB vs RBBB ==
[[Image:LBTB_RBTB_en.png|thumb| A bundle branch block causes a delay in the depolarization of the right (RBBB) or left (LBBB) ventricle. In RBBB the QRS complex shows a second peak or R' in V1.]]
Check V1 when QRS > 0,.12 sec.
When the "terminal force" of the QRS in V1 is below the baseline (i.e. QS wave), a LBBB is the most likely diagnosis.
When the "terminal force" of the QRS in V1 is above the baseline (i.e. RSR' wave), it's a RBBB.
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