The purpose of this investigation is to collect a database of simultaneous electrocardiogram (ECG) recordings from the SANSA device and a reference 12-lead ECG recording device.

The purpose of this database is to aid development and evaluation of algorithms to detect cardiac arrhythmias and other parameters from the electrocardiogram. Example analyses that may utilize this database are ECG vector transformations and ECG waveform timing analyses.

The study is for scientific purposes and does not intend to diagnose, cure, mitigate, treat, or prevent any disease and does not involve any medical procedures.

Inclusion Criteria:

• are 18 years of age or older.
• are able to read, understand, and sign informed consent documentation.
• are willing to undergo simultaneous recordings with the Sansa and 12-lead ECG device.

Exclusion Criteria:

• exhibit deformities of the chest (e.g., pronounced scarring, pectus carinatum) that would interfere with sensor placement
• have broken or injured skin that would interfere with sensor placement
• are known to experience adverse reactions to medical-grade adhesive
• are pregnant

All subjects will receive the same treatment; there are no groups or cohorts that receive different treatments. Study populations at each site will be enrolled from patients, site personnel, or the general population. Recruitment may, from time to time, target enrichment of a particular demographic, subject characteristic, or cardiac arrhythmia to increase the diversity and representation of the database.

No IPD will be shared to other researchers.