Echo/Doppler-derived time intervals are able to predict left ventricular reverse remodeling after cardiac...

Area of Science:

• Cardiology
• Cardiac Imaging
• Heart Failure Management

Background:

• Cardiac resynchronization therapy (CRT) is a treatment for heart failure.
• Identifying patients who will benefit from CRT is crucial for effective treatment.
• Echocardiography and Doppler are non-invasive imaging techniques used to assess cardiac function.

Purpose of the Study:

• To evaluate the predictive value of echocardiogram/Doppler derived indices for identifying cardiac resynchronization therapy (CRT) responders.
• To assess if indices reflecting isovolumic phases of the cardiac cycle can predict CRT response.

Main Methods:

• 105 patients undergoing CRT had echo/Doppler parameters measured at baseline and 6 months post-therapy.
• Key parameters included myocardial performance index (MPI) and total isovolumic time (t-IVT).
• Responders were defined by a ≥15% reduction in left ventricular end-systolic volume.

Main Results:

• Responders had significantly higher baseline t-IVT and MPI compared to non-responders.
• Receiver operating characteristic curve analysis indicated t-IVT and MPI could predict CRT response with high sensitivity and specificity.
• Baseline t-IVT showed a strong correlation with the reduction in end-systolic volume.

Conclusions:

• Echocardiogram/Doppler derived indices reflecting isovolumic contraction and relaxation abnormalities can predict CRT response.
• These indices are valuable tools for identifying patients likely to achieve reverse remodeling after CRT.