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Heart Failure: Targeting the right patients for CRT-D
Date:5/22/2011

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In this latest analysis of MADIT-CRT, investigators analyzed echocardiograms from 1077 patients enrolled in MADIT-CRT (CRT-D n=66; ICD, n=416) who had echocardiographic images of sufficient quality to allow analysis of synchrony and contractile function. Researchers were blinded to the randomization and study outcomes.

Results showed that patients with mild to moderate dyssynchrony at baseline (defined as a time-to peak transverse strain SD of 142-230 ms) and greater baseline contractile function (longitudinal strain < -8.7%) improved to a greater extent when randomised to the CRT-D group than the ICD only group.

The study showed that over a year each 10 ms decrease in LV dyssynchrony was associated with a 3% reduction in the primary outcome of death or heart failure, and each 5 point absolute increase in LV strain was associated with a 75% reduction in the primary outcome.

"These results suggest that the patients who are most likely to benefit from CRT-D are those with at least some dyssynchrony who have relatively preserved contractile function," said Solomon, adding that the observation that improvements in synchrony and contractile function were associated with reduced death and heart failure events, suggests that the benefits delivered by CRT relate to improvements in these factors. "Future studies will continue to try to identify the patients who are most likely to benefit from this expensive but highly effective therapy," he said.


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Contact: Jacqueline Partarrieu
press@escardio.org
33-492-947-756
European Society of Cardiology
Source:Eurekalert

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