Electrocardiographs are regulated by FDA as Class II medical devices. Most require 510(k) premarket notification clearance before they can be legally marketed in the US. The importer of record must ensure the device has an active 510(k) clearance and that the foreign manufacturer is registered with FDA. Devices with interpretive software may face additional scrutiny regarding the software's regulatory status as a Software as a Medical Device (SaMD).

Standard 12-lead ECGs are the clinical benchmark for full cardiac assessment and dominate hospital and clinic procurement. 3-lead and 6-lead portable devices are used in ambulatory monitoring, emergency response, and point-of-care settings. Newer devices with 15 or 18 leads offer enhanced posterior and right-ventricular views for specific indications. Buyers should confirm that the lead configuration matches the intended clinical use, as this affects both the regulatory predicate and reimbursement coding.