And in V, 1 where it may be positive, negative or biphasic.

在V，1导联中，它可能是正的，负的或双相的。

In V1, P wave is biphasic, with an initial positive deflection corresponding to activation of the right atrium, and a subsequent negative deflection, resulting from activation of the left atrium.

在V1导联中，P波是双相的，初始正偏斜对应于右心房激活，随后负偏斜由左心房激活引起。