Clinical value of lead aVR

Area of Science:

• Cardiology
• Electrocardiography

Background:

• Lead aVR in surface electrocardiography (ECG) has been historically undervalued due to its unique orientation.
• Its diagnostic utility was often overshadowed by more conventional frontal leads and the isolation of unipolar leads.

Purpose of the Study:

• To review the significant clinical value of lead aVR in recognizing various cardiac conditions.
• To highlight its underappreciated role in diagnosing both common and uncommon clinical scenarios.

Main Methods:

• Literature review of studies investigating the diagnostic capabilities of lead aVR.
• Analysis of clinical significance across a spectrum of cardiovascular diseases.

Main Results:

• Lead aVR demonstrates high sensitivity in identifying obstructed epicardial coronary arteries.
• It aids in distinguishing the culprit lesion in myocardial infarction.
• Lead aVR is valuable in recognizing conditions like pericarditis, Brugada syndrome, and fascicular blocks.

Conclusions:

• Despite historical neglect, lead aVR is a crucial diagnostic tool in electrocardiography.
• Its application extends beyond coronary artery disease to a wide range of significant clinical conditions.