Detection of multivessel disease post myocardial infarction using an exercise-induced QRS score

Area of Science:

• Cardiology
• Diagnostic Imaging
• Medical Research

Background:

• Myocardial infarction (MI) survivors often have coexisting coronary artery disease (CAD).
• Accurate detection of multivessel disease (MVD) is crucial for guiding treatment in MI patients.
• Non-invasive markers are needed to assess the extent of CAD beyond the infarct-related artery.

Purpose of the Study:

• To evaluate the Athens QRS score's efficacy in detecting stenoses in non-infarct-related coronary arteries.
• To determine if the Athens QRS score can differentiate single-vessel disease (SVD) from MVD in patients with prior MI.

Main Methods:

• A cohort of 125 patients with a history of MI underwent treadmill exercise testing and coronary arteriography.
• Athens QRS score values and ST-segment depression were recorded.
• Receiver operating characteristic (ROC) curve analysis was used to assess diagnostic performance.

Main Results:

• Athens QRS score values showed an inverse relationship with the extent of CAD (1-VD, 2-VD, 3-VD).
• The area under the ROC curve for QRS score values < -3 mm (0.948) was significantly higher than for ST-segment depression > or = 1 mm (0.792).
• The Athens QRS score demonstrated superior ability to detect multivessel disease compared to ST-segment depression.

Conclusions:

• Athens QRS score values < -3 mm may effectively distinguish between single- and multivessel coronary artery disease in MI patients.
• The Athens QRS score shows promise as a non-invasive tool for assessing CAD extent post-MI.
• Further validation of the Athens QRS score for MVD detection is warranted.