A wide range gate data acquisition for diagnosing coronary artery disease

Area of Science:

• Cardiovascular Ultrasound
• Medical Diagnostics
• Biomedical Engineering

Background:

• Blood flow turbulence from coronary artery stenosis generates vibrations.
• These vibrations impact surrounding coronary artery tissue and the adjacent myocardial wall.
• Investigating novel diagnostic methods for coronary artery disease (CAD) is crucial.

Purpose of the Study:

• To evaluate the diagnostic feasibility of a novel Wide Range Gate (WRG) ultrasound data acquisition method.
• To assess WRG ultrasound's capability in detecting high-frequency vibrations indicative of coronary artery stenosis.
• To establish WRG ultrasound as a potential initial diagnostic tool for CAD.

Main Methods:

• Utilized a Verasonics ultrasound system for WRG data acquisition.
• Conducted clinical trials on 80 subjects with suspected CAD.
• Performed WRG data acquisition prior to coronary angiography (CAG) for comparison.

Main Results:

• WRG data analysis demonstrated 80% sensitivity and 84% specificity compared to CAG.
• Specific diagnostic performance varied by artery: LAD (81% sensitivity, 79% specificity), LCx (75% sensitivity, 89% specificity), RCA (85% sensitivity, 82% specificity).
• Positive vibrometry results were identified as an independent predictive factor for CAD in multivariate analysis.

Conclusions:

• A new ultrasound-based diagnostic method for CAD was proposed.
• The WRG data acquisition method shows significant potential as an initial screening tool for coronary artery disease.
• Further validation may establish WRG ultrasound as a valuable non-invasive diagnostic approach.