A Food and Drug Administration panel unanimously voted for broader use of Boston Scientific’s cardiac resynchronization therapy defibrillators, or CRT-Ds, for patients with heart failure who have no symptoms or only mild symptoms.

CRT-Ds are approved now for treating the most advanced stages of heart failure, but a Boston Scientific study showed they could also benefit healthier patients.

However, the panel said that the use of the devices should only pertain to patients who have a heart problem that causes the left ventricle to contract later than the right ventricle.

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