Heart Failure Clinical Trial
Official title:
Optimization of Response to Cardiac Resynchronization Therapy by Electrocardiogram: an Assessment of Medium-term Response
New simpler methods to optimize cardiac resynchronization therapy (CRT) are being evaluated,
such as the use of the electrocardiogram.
In this prospective, double-blind, study, the investigators will evaluate:
Primary endpoint: To compare the clinical response to CRT in patients with the programming
optimized by QRS versus the nominal suggested by the device.
Secondary endpoints:
1. To compare cardiac remodeling in patients with the programming optimized by QRS versus
the nominal suggested by the device.
2. To evaluate the degree of asynchrony in both groups (nominal versus optimization by QRS)
with respect to the intrinsic rhythm.
3. To evaluate the echocardiographic improvement in left ventricular (LV) filling in both
groups.
4. To evaluate the differences in the optimal atrioventricular (AV) delay with atrial
sensing or atrial pacing.
For that, 180 patients with an indication for CRT will be randomized to nominal programming
of the device or optimization by the electrocardiogram for a narrower QRS. A clinical and
echocardiographic evaluation will be done at baseline, 6 and 12 months.
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