A wearable device (10) for acquiring electrocardiographic (ECG) signals is described, which comprises an envelope (11) comprising a first electrode (14) arranged on a first surface (15) and a second electrode (16) arranged on a second surface (18), the first electrode (14) to be placed in contact with the skin of a subject to be monitored and the second electrode (16) being accessible to be placed in contact with the skin of another part of the subject different from the part in contact with the first electrode (14), the device (10) comprising an electronic circuit (20) with a supplying section (30), an analogue section (40) connected to the first electrode (14) and to the second electrode (16) and adapted to filter the signal acquired by the first electrode (14) and by the second electrode (16), and a digital section (50) connected to the analogue section (40) and adapted to acquire the output signal from the analogue section (40).
