Figure 2. Comparison of left atrial whole conduction time and
velocity between patients with and without low-voltage areas
Left atrial whole conduction time and velocity between patients with and
without low-voltage areas were compared. Conduction time was defined as
the time difference between the start (septum) and end of the left
atrial propagation wave front (lateral mitral annulus) during right
atrial pacing or sinus rhythm. Left atrial conduction velocity was
calculated as left atrial anterior conduction distance divided by
conduction time. Anterior conduction distance was measured manually by
tracing the pathway of the propagation wave front from the start point
to the end point in the anterior left atrium. Patients with localized
low-voltage areas at any portion of the left atrium demonstrated longer
conduction time and a slower conduction velocity than those without.