Left atrial size and abnormal conduction zone
For further analysis, all patients were divided into three groups as
follows: normal / mildly enlarged LA group (n=68), moderately enlarged
LA group (n=21), and severely enlarged LA group (n=11) according to LA
diameter/BSA. Larger LA size was associated with lower global LA voltage
(normal/mildly enlarged LA group: 5.8±2.2 mV, moderately enlarged LA
group: 5.0±2.1 mV, severely enlarged LA group: 3.2±1.5 mV, P=0.0011).
The incidence and number of ACZ did not differ among the three groups.
A longer ACZ was significantly
associated with a larger LA size (Table 2 , normal/mildly
enlarged LA group: 49.4±40.2 mm, moderately enlarged LA group: 62.7±45.6
mm, severely enlarged LA group: 77.8±38.3 mm, P=0.0469).