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Bradycardia: Difference between revisions
→Ventricular Conduction Block
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If the two fascicles of the left bundle branch show conduction block there is a left bundle branch block, this bifascicular block is uncommon in healthy patients and further cardiologic investigations need to be performed to screen for underlying disease. Left bundle branch block causes the left ventricle to activate later then the right ventricle. This results in typical ECG characteristics, most importantly a broad QRS of >120ms. In V1 a broad monomorphic S wave can be seen (sometimes with a small r wave) representing slow left ventricular activation. In the lead V6 a broad monomorphic R wave is seen with no Q waves. | If the two fascicles of the left bundle branch show conduction block there is a left bundle branch block, this bifascicular block is uncommon in healthy patients and further cardiologic investigations need to be performed to screen for underlying disease. Left bundle branch block causes the left ventricle to activate later then the right ventricle. This results in typical ECG characteristics, most importantly a broad QRS of >120ms. In V1 a broad monomorphic S wave can be seen (sometimes with a small r wave) representing slow left ventricular activation. In the lead V6 a broad monomorphic R wave is seen with no Q waves. | ||
[[File:Intraventricular Conduction.svg]thumb|600px|Traces of right bundle branch block and the different types of left bundle branch conduction disorders.] | [[File:Intraventricular Conduction.svg]thumb|600px|Traces of right bundle branch block and the different types of left bundle branch conduction disorders.]] | ||
==Functional conduction disorders: Aberrant Conduction== | ==Functional conduction disorders: Aberrant Conduction== | ||