Disclosed are devices and methods for determining and memorializing chest electrode placement locations on a user. The device utilizes two datum reference points in the patient's anatomy, the Jugular notch and the Xiphoid process, which are easily found and repeatable and which serve to ensure the device is in the correct position to memorialize chest electrode placement locations. The device may comprise a first plate and a second plate operatively coupled to the first plate so that the second plate slides along a vertical axis of the first plate and the first plate slides along a vertical access of the second plate. The device may further comprise a template grid having a plurality of cells printed thereon. The template grid may have a coordinate system for identifying each of the plurality of cells. The template grid may be modified to indicate a set of chest electrode placement locations on the user.

A diagnostic electrocardiogram (ECG) apparatus (20) is disclosed herein. The apparatus comprises a body and printed electrodes. The body (110) includes extension members (61-66), with each having an expansion section (61a) and at least one electrode section (61b). Each expansion section (61a) has at least one concertina member (75) and at least one connector member (76). The diagnostic ECG apparatus (20) conforms to American Heart Association guidelines on diagnostic resting ECGs.

A wearable diagnostic electrocardiogram (ECG) garment is disclosed herein. The wearable diagnostic ECG garment comprises a garment body, screen-printed electrodes positioned on the body, and screen-printed wires positioned in the garment body, each of the screen-printed wires connected from a central connector module to a screen-printed electrode.