Clinical Performance of Masimo INVSENSOR00057 for Atrial Fibrillation Detection

Inclusion Criteria: * The subject is 18 to 80 years of age. * Subject can read and communicate in English. * Subject's cardiac rhythm shall be Normal Sinus Rhythm or Atrial Fibrillation (Afib). This determination will be made using FDA cleared 3-lead ECG which will label subject's cardiac rhythm as such. Exclusion Criteria: * Subject has open wounds, inflamed tattoos or piercings on the area of device placement, and/or has any visible healing wounds that the investigator and/or medical professional determines may place them at an increased risk for participation. * Subject has any medical condition which in the judgment of the investigator and/or study staff, renders them ineligible for participation in this study or subject is deemed ineligible by the discretion of the investigator/study staff.