Figure 1. Comparison of mean regional voltage between patients with and without low-voltage areas
Mean regional voltages between patients with and without low-voltage areas were compared. Low-voltage areas indicated localized areas with bipolar voltage < 0.50 mV. Mean regional voltage was calculated by averaging evenly selected 10 points at the region. The left atrium was divided into 6 regions. Patients with localized low-voltage areas at any portion of the left atrium had significantly lower mean regional voltage throughout all regions than those without.