Visual Assessment and Longitudinal Strain During Dobutamine Stress Echocardiography

Area of Science:

• Cardiology
• Medical Imaging
• Echocardiography

Background:

• Dobutamine stress echocardiography (DSE) is a standard non-invasive method for detecting coronary artery disease.
• Emerging echocardiographic techniques like strain and strain rate imaging offer quantitative assessment of myocardial function.
• These advanced methods may enhance the diagnostic performance of DSE.

Purpose of the Study:

• To evaluate the correlation between visual interpretation and longitudinal strain (LS) during dobutamine stress echocardiography.
• To determine if LS improves the assessment of left ventricular contractility in DSE.
• To explore the utility of LS in identifying myocardial viability.

Main Methods:

• Observational study at a Cardiology Clinic involving 70 patients undergoing DSE.
• Patients were categorized into diagnostic and viability groups.
• Left ventricular segmental contractility was assessed visually and quantitatively using longitudinal strain (LS).

Main Results:

• Significant changes in LS were observed in segments with and without impaired contractility during DSE.
• In the diagnostic study, LS showed significant differences between baseline and peak stress in both impaired and non-impaired segments.
• In the viability study, LS demonstrated significant improvement in segments with improved contractility and significant worsening in segments without improved contractility.

Conclusions:

• A strong correlation exists between visual assessment of left ventricular contractility and longitudinal strain during DSE.
• Longitudinal strain is a valuable quantitative tool that complements visual interpretation in DSE.
• These findings suggest that incorporating LS can improve the accuracy of DSE for diagnosing coronary artery disease and assessing myocardial viability.