Patients

Previous enrolment into the current study,

Cardiac pacemaker or another implanted electrical device

Women who are pregnant or breastfeeding

Inability to follow the procedures of the study, e.g., due to language problems, psychological disorders, dementia, delirium etc. of the participant

Healthy volunteers:

Previous enrolment into the current study,

Cardiac pacemaker or another implanted electrical device

Women who are pregnant or breastfeeding

Inability to follow the procedures of the study, e.g., due to language problems, psychological disorders, dementia, delirium etc. of the participant

Presence of diagnosed chronic medical condition

Sleepiz One+ Versus Capnography and Electrocardiography