Figure 1.

The RESAFE‐HF study timeline. 6MWD, 6 min walk distance; 6MWT, 6 min walk test; CIEDs, cardiac implantable electronic devices; CPX, cardiopulmonary exercise; FCM, ferric carboxymaltose; GLS, global longitudinal strain; Hb, haemoglobin; HFrEF, heart failure with reduced ejection fraction; ID, iron deficiency; IV, intravenous; KCCQ, Kansas City Cardiomyopathy Questionnaire; LPs, late potentials; LVEF, left ventricular ejection fraction; NT‐proBNP, N‐terminal pro‐brain natriuretic peptide; QoL, quality of life; TSAT, transferrin saturation.