Virtual Reality Exercise on the Intensive Care Unit in Heart Patients

"Run 1 Video game: Phasic Alertness (Alert S1) Instruction phase 2 minutes, 2 x 3 minutes of rest, followed by 5 x 60 sec of video game activity, alternating with 60 sec of rest.~Run 2 Video game: Intrinsic Alertness (Alert S2) Instruction phase 2 minutes, 2 x 3 minutes of rest, followed by 5 x 60 sec of video game activity, alternating with 60 sec of rest.~Run 3 Video game: Visual modality (Select S1) Instruction phase 2 minutes, 2 x 3 minutes of rest, followed by 5 x 60 sec of video game activity, alternating with 60 sec of rest.~Run 4 Video game: Acoustic / Stimulus Combinations (Select S2) Instruction phase 2 minutes, 2 x 3 minutes of rest, followed by 5 x 60 sec of video game activity, alternating with 60 sec of rest."