Changes in plasma level of N-terminal pro-BNP at twelve weeks relative to baseline pro-BNP. 12 weeks from baseline pro-BNP assessment [clinicaltrials_resource:5841de5e3f46e9bb55871ede7bcce4c3]

Record events of death, ICD discharge and hospitalization due to heart failure exacerbation. Interrogate ICD memory for significant ventricular arrhythmias (ventricular tachycardia and ventricular fibrillation) that did not cause ICD discharge.

Changes in plasma level of N-terminal pro-BNP at twelve weeks relative to baseline pro-BNP. 12 weeks from baseline pro-BNP assessment [clinicaltrials_resource:5841de5e3f46e9bb55871ede7bcce4c3]

Record events of death, ICD discharge and hospitalization due to heart failure exacerbation. Interrogate ICD memory for significant ventricular arrhythmias (ventricular tachycardia and ventricular fibrillation) that did not cause ICD discharge.