Observational, Non-Interventional Study Supporting Validation of VO2Max Estimation Methods Using Results in Patients Receiving Standard of Care Cardiopulmonary Exercise Tests (CPET)

Inclusion criteria

• Willing and able to comply with protocol procedures and available for the duration of the study.
• Willing to sign and date informed consent document for study participation.
• Participant is undergoing the Cardiopulmonary Exercise Test (CPET) as Standard of Care

Exclusion criteria

• Participant is pregnant, lactating or ≤30 days post-partum.
• Participant has limited or no intrinsic sinus node function (i.e. chronic atrial pacing).

• If participant has an indwelling cardiac device and programming cannot be sufficiently ascertained to assure sinus node competence and lack of atrial pacing, the patient should be excluded.
• Barostim (™) or similar noncardiac electrical pulse generating device in situ.
• Complex congenital heart disease (even repaired or palliated) with the following exception:

• Biventricular physiology without severe valvar dysfunction (e.g. free pulmonary insufficiency) at the discretion of the investigator.
• Any history of allergy to adhesive
• Any cognitive or physical limitations that, in the opinion of the investigator, limits the participant's ability to fully follow study procedures and/or reach a respiratory exchange ratio of 1.0.