QT variability index on 24-hour Holter independently predicts mortality in patients with heart failure: analysis of Gruppo Italiano per lo Studio della Sopravvivenza nell'Insufficienza Cardiaca (GISSI-HF) trial
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PII: S1547-5271(11)00414-0
doi:10.1016/j.hrthm.2011.03.055
Published by Elsevier Inc.
