Electrocardiogram watch clasp

A method for measuring an electrical activity of a heart with a device wearable on a body part of a user, the device having a strap configurable to be fitted over the body part, a first sensor disposed on the strap, and a clasp joined to a portion of the strap comprising a second sensor, said second sensor being electrically insulated from the first sensor, the method comprising:

• determining if the first sensor is in contact with the body part;
• determining if the electrically insulated second sensor at the clasp is in contact with a different body part of the user;
• and
• receiving data indicative of an electrocardiogram (ECG) signal of the user from only the first sensor and the second sensor in response to determining that the first sensor is in contacting the body part and that the electrically insulated second sensor is in contact with a different body part of the user.

A device for measuring an electrical activity of a heart and being wearable on a body part of a user, the device comprising:

• a strap configurable to be fitted over the body part, and having an interior surface contacting the body part when worn by the user, and an exterior surface facing away from the body part;
• a first sensor disposed on the interior surface, and being in contact with the body part;
• and
• a clasp having a second sensor, the second sensor being electrically insulated from the first sensor;
• and
• a processor disposed on the strap, being coupled to the first sensor and the second sensor, and configured to transmit data indicative of an electrocardiogram (ECG) signal of the user from only the first sensor and the second sensor when the second sensor is touched by a different body part of the user.