A garment that includes textile ECG arm electrodes (110LA and 110RA) such as knitted electrodes wherein the textile ECG arm electrodes are located within the garment such that when the garment is worn the textile ECG arm electrodes are situated adjacent to the bodily skin overlaying the outmost region of the Pectoralis major muscle proximal to the shoulder muscle. Preferably the positioning of the textile ECG arm electrodes within the garment is designed to match the size of the garment.