<P> There are also partial blocks of the left bundle branch: "left anterior fascicular block" (LAFB) and a "left posterior fascicular block" (LPFB). This refers to the bifurcation of the left bundle branch . </P> <P> The presence of LBBB results in that electrocardiography (ECG) cannot be used to diagnose left ventricular hypertrophy or Q wave infarction, because LBBB in itself results in widened QRS complex, and changes in the ST - T segment consistent with ischemia or injury . </P> <Ul> <Li> Patients with LBBB require complete cardiac evaluation, and those with LBBB and syncope or near - syncope may require a pacemaker . </Li> <Li> Some patients with LBBB, a markedly prolonged QRS (usually> 150 ms), and systolic heart failure may benefit from a biventricular pacemaker, which allows for better synchrony of heart contractions . </Li> </Ul> <Li> Patients with LBBB require complete cardiac evaluation, and those with LBBB and syncope or near - syncope may require a pacemaker . </Li>

What is the treatment for left bundle branch block
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