Headquartered in Bothell, Washington, Cardiac Science develops, manufactures, and markets a family of advanced diagnostic and therapeutic cardiology devices and systems, including automated external defibrillators (AED), electrocardiograph devices (ECG/EKG), cardiac stress test treadmills and systems, Holter monitoring systems, hospital defibrillators, cardiac rehabilitation telemetry systems, and cardiology data management systems (informatics) that connect with hospital information (HIS), electronic medical record (EMR), and other information systems.