Seven trials studied the effects of telemedicine on (re)hospitalisation and mortality in subgroups based on baseline laboratory variables: N‐terminal pro-B-type natriuretic peptide [13, 15–17, 19], mid-regional pro-adrenomedullin [13, 17], mid-regional pro-atrial natriuretic peptide [17], estimated glomerular filtration rate [13, 17, 24] and HF medication (dose of diuretics) [15]. This evidence concerns the gene NPPA and hydrops fetalis.