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9% and a specificity of 87.5%. CONCLUSION A short LVAT indicated favorable mechanical synchrony in SPECT imaging. LVAT less then 76 ms might be a practical parameter for defining LBB capture.BACKGROUND Surgical treatment of lesions involving the ventral craniovertebral junction (CVJ) and the lower clivus, traditionally involved complex lateral or transoral approaches to the skull base. However, mid or upper clivus involvement requires more extensive lateral approaches. Recently, the endoscopic endonasal approach (EEA) has become the st
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