Left ventricular 12 segmental strain imaging predicts response to cardiac resynchronization therapy

Area of Science:

• Cardiology
• Echocardiography
• Heart Failure Management

Background:

• High rates of non-response to cardiac resynchronization therapy (CRT) necessitate improved patient selection.
• Echocardiographic parameters are being investigated to predict CRT response.
• Identifying responders is crucial for optimizing heart failure treatment.

Purpose of the Study:

• To identify echocardiographic parameters that predict response to cardiac resynchronization therapy (CRT).
• To evaluate the utility of strain patterns in predicting CRT outcomes.

Main Methods:

• Prospective study of 45 heart failure patients receiving CRT-D.
• Echocardiographic parameters, including strain patterns (Tε-SD), were assessed pre- and post-CRT.
• Response defined as ≥15% decrease in left ventricular end-systolic volume (LVESV) at 6 months.

Main Results:

• 48.9% of patients responded to CRT, showing significant improvements in NYHA class, LVEDV, and 6-minute walk distance.
• Responders exhibited higher interventricular mechanical delay and Tε-SD compared to non-responders.
• Multivariate analysis identified Tε-SD as a significant predictor of CRT response (OR = 1.02, P = 0.02).

Conclusions:

• Left ventricular 12-segment strain imaging, specifically Tε-SD, is a promising echocardiographic tool for predicting CRT response.
• This parameter can aid in selecting patients who are most likely to benefit from CRT.
• Further validation of strain imaging for CRT patient selection is warranted.