Heart Tronics, Inc., a medical device company, engages in the research, development, and marketing of medical devices in the United States. Its medical devices are used to monitor and measure physiological signals in order to detect diseases that impact an individual's health. The company offers Fidelity 100 Monitor System, an integrated system in which its component Model 100 Patient Module collects, processes, and amplifies electrocardiogram (ECG) signals from that patient through a set of 10 electrodes that are wirelessly transmitted to the laptop computer. Its products in the development stage include Fidelity 350 Holter Monitor, an ambulatory Holter monitor that collects ECG data of arrhythmia and transient heart disease, while the patient carries out daily activities away from the physician's office or hospital. The company's products in the development stage also consist of Fidelity 200 Event Recording System/Heart Tempo Card, a non-prescription heart monitoring device, which is used as an early-detection device by patients who desire to monitor their condition. Its products also include Cardiac Vest, a lightweight, close-fitting vest or undergarment made of stretchable material in which the electrodes are stitched into the fabric; and Fidelity 400 Intracardiac Monitor that applies its proprietary physiological signal acquisition and amplification technology to read intracardiac signals procured from intracardiac catheter. The company was formerly known as Signalife, Inc. and changed its name to Heart Tronics, Inc. in November 2008. Heart Tronics, Inc. was incorporated in 1987 is headquartered in Studio City, California.