Data from study: EffecTs of tRanscutaneous vAgus Nerve Stimulation in heart Failure patients with moderately rEduced or preseRved left ventricular function (TRANSFER Trial)

Data pertaining to single-blind, randomised, cross-over studies: 1) TVNS_AIM_1_Trial_1 to compare the acute effect of left tVNS at 25 Hz and 10 Hz, 2) TVNS_AIM_1_Trial_2 to compare the acute effect of left and right tVNS at the best frequency identified in study 1, 3) TVNS_AIM_1_Trial_3_HS to compare the acute effect of the identified optimal stimulation protocol with sham stimulation in Healthy subjects and 4) TVNS_AIM_1_Trial_3_HF  to compare the acute effect of the identified optimal stimulation protocol with sham stimulation in Heart failure patients