Angel Medical Systems develops cardiac medical devices. It offers AngelMed Guardian system, an implantable cardiac monitoring and alerting system, which detects and warns patients of acute episodes of cardiac ischemia related to the progression of coronary artery disease and thrombotic coronary occlusion caused by vulnerable plaque ruptures.The Company’s AngelMed Guardian System components include an internal implantable device that is designed to detect, analyze, and record crucial heart signal data; vibrate to alert patients of cardiac events; and track ST deviations vs. heart rate for up to six months. Its AngelMed Guardian System components also include an external telemetry device; and a programmer, which aids physicians in evaluating heart signals.