Figure 2. Representative P-SAECG findings
P-SAECGs of representative patients are shown. Solid perpendicular lines
indicate the start and end of the P-wave. Dotted perpendicular lines
indicate the point preceding the end of the P-wave by 20 ms. Positive
ALP was defined as an RMS20 <2.2 µV or a PWD
>115 ms.
P-SAECG: P-wave signal-averaged electrocardiography,
RMS20: root mean square voltage during the terminal 20
ms, PWD: P-wave duration.