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==Biatrial enlargement== | ==Biatrial enlargement== | ||
[[File:E000569.jpg|thumb| | [[File:E000569.jpg|thumb|rightBiatrial enlargement]] | ||
;Biatrial enlargement | ;Biatrial enlargement | ||
:Biphasic p wave in V1 of more than 0.04 sec duration. The positive initial part is > 1.5mm and the negative terminal part > 1mm | :Biphasic p wave in V1 of more than 0.04 sec duration. The positive initial part is > 1.5mm and the negative terminal part > 1mm |