Tissue Doppler Imaging (TDI) Versus Electrocardiography (ECG) Interventricular Pacing Delay Optimization in Cardiac Resynchronization Therapy (CRT)

The aim of this study was to compare the response to cardiac resynchronization therapy when the interventricular pacing interval was optimized by Tissue Doppler Imaging (TDI) to response when it was optimized following QRS width criteria.

Inclusion Criteria:

• Patients submitted to de novo implant due to conventional cardiac resynchronization therapy indications.

Exclusion Criteria:

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