It is not possible to wear a bra for an ECG. During the ECG examination, V1 of the chest lead is located in the fourth intercostal space at the right edge of the sternum, while V2 is located in the fourth intercostal space at the left edge of the sternum, which are just in the area of the female breast. While V3 is located at the midpoint of the line connecting the two points of V2 and V4, and V4 is located at the intersection of the midline of the left clavicle and the fifth intercostal space, which is just at the lower edge of the woman’s left breast, and V6 is located at the same level of the midline of the left axilla and V4. If a bra is worn at the time of the examination, this can lead to inaccurate positioning when connecting the chest leads, which may affect the results of the examination. Usually, women need to remove their blouse and bra during the ECG to expose their breasts, which facilitates the connection of the chest leads. It is recommended that women wear separate clothes for ECG to facilitate the operation, and follow the instructions of the medical staff and actively cooperate with the operation to ensure the accuracy of the test results.