Comparison of digitized ECGs simultaneously recorded with CR and V leads

Area of Science:

• Cardiology
• Medical Devices

Background:

• Standard electrocardiograms (ECG) use multiple leads.
• Unipolar V leads are commonly used for chest ECG recordings.
• Developing portable ECG devices is crucial for out-of-hospital use.

Purpose of the Study:

• To evaluate the diagnostic similarity between bipolar chest-right arm (CR) leads and unipolar V leads for ECG.
• To assess the feasibility of using CR leads in emergency cardiac care.
• To support the development of a portable ECG device.

Main Methods:

• Simultaneously recorded ECGs using CR and V leads on six chest sites in 45 cardiac patients.
• Four cardiologists independently evaluated the unmarked ECG tracings.
• Compared diagnostic interpretations between CR and V lead recordings.

Main Results:

• ECGs from CR leads showed diagnostic similarity to V leads in nearly 90% of patients.
• Minor differences in waveform amplitudes (P, Q, R, S, T) were observed.
• CR leads demonstrated comparable diagnostic accuracy to V leads.

Conclusions:

• Bipolar CR leads offer a diagnostically similar alternative to unipolar V leads for ECG.
• The simplified setup of CR leads (two electrodes) is advantageous for cardiac emergencies.
• CR leads contribute to the development of efficient, portable electrocardiography.