Electrocardiographic chest wall mapping in the diagnosis of coronary artery disease

Area of Science:

• Cardiology
• Diagnostic Imaging
• Non-invasive Cardiology

Background:

• Chest pain suggestive of angina is a common clinical presentation.
• Coronary angiography is the gold standard for diagnosing coronary artery disease (CAD) but is invasive.
• Non-invasive methods are needed for efficient patient selection for angiography.

Purpose of the Study:

• To evaluate the diagnostic accuracy of 16-electrode chest wall mapping for detecting CAD.
• To assess the sensitivity and specificity of this non-invasive method in identifying significant coronary artery stenosis.

Main Methods:

• 150 patients with suspected angina underwent chest wall mapping using 16 electrocardiographic electrodes at rest and during bicycle ergometry.
• ECG parameters analyzed included ST segment changes, inverted U waves, and Q waves.
• All patients subsequently underwent coronary angiography for comparison.

Main Results:

• The method demonstrated 98% sensitivity and 88% specificity for detecting significant CAD (≥50% stenosis).
• It accurately identified lesions in specific coronary arteries: Left Anterior Descending/Diagonal (87%/85%), Right Coronary Artery (71%/85%), and Circumflex Artery (85%/80%).

Conclusions:

• 16-electrode chest wall mapping is a reliable non-invasive screening tool for patients with suspected angina.
• This technique can effectively aid in selecting appropriate candidates for invasive coronary angiography.
• The findings support the utility of ECG-based chest wall mapping in the diagnostic workup of CAD.