The Prognostic Significance of Narrow Fragmented <scp>QRS</scp> on Admission Electrocardiogram in Patients Hospitalized for Decompensated Systolic Heart Failure

Presence of narrow fQRS is associated with worse NYHA functional class in patients hospitalized for decompensated HF. Narrow fQRS predicts cardiovascular mortality in a specific subgroup of systolic HF patients, namely those hospitalized for decompensated HF of both ischemic and nonischemic causes.