Precordial electrode placement in women

Area of Science:

• Cardiology
• Medical Imaging
• Biomedical Engineering

Background:

• Standardized precordial electrocardiogram (ECG) electrode placement dates to the 1940s.
• In women, electrodes V3-V6 are often placed under the breast, deviating from standard anatomical positions.
• This practice may affect ECG interpretation and diagnostic accuracy.

Purpose of the Study:

• To compare ECGs recorded with precordial electrodes in standard anatomical positions versus under-breast positions in women.
• To establish normal ECG limits for leads V3-V6 with correct anatomical placement and compare them to existing limits.

Main Methods:

• 84 women had ECGs recorded with electrodes in both standard and under-breast positions.
• A separate study recorded ECGs in 299 healthy women using standard anatomical placement for leads V3-V6.
• Normal ECG limits were determined and compared between the two placement methods.

Main Results:

• Electrodes placed in the correct anatomical positions demonstrated less variability.
• Significant differences were observed between the new normal limits and previously established limits.
• Under-breast placement may lead to altered ECG readings.

Conclusions:

• Correct anatomical precordial electrode placement in women reduces variability.
• Established normal ECG limits may not be accurate for women with under-breast electrode placement.
• Further data collection and analysis are necessary to provide definitive recommendations on precordial electrode positioning in women.