An electrocardiographic device for sensing cardiac activity in a user, the electrocardiographic device comprising: plurality of electrodes provided at a surface of the device for electrical engagement with a pair of extremities of a user one or more movement sensors arranged to, in use, detect movement of a users extremities and a control unit configured to receive electrical signals from the electrodes and to, in use, process said signals in dependence on the output of the one or more movement sensors so as to filter variations from the signals due to movement of the users extremities.
