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Why the qrs complex becomes wide and tall in LBBB ?

April 26, 2017complex LBBB tall wide

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Why the qrs complex becomes wide and tall in LBBB ?

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The qrs complex is wide , due to delayed conduction over non specialized fibres .The qrs becomes are tall due to temporal dissociation of RV and LV forces , which leaves the LV forces unopposed , thus a tall qrs is inscribed , without the neutralizing effect of RV forces.