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The OM-A device is intended for the treatment of chronic stable angina that is refractory to optimal anti-anginal medical therapy and without options for revascularization. It is intended for use in healthy patients to provide improvement in vasodilation, and increased blood flow. It is intended for use under the oversight of a healthcare professional.

Enhanced External Counterpulsation Device Plus OM-A is a computer-controlled system that applies external pressure via cuffs to the patient's lower extremities in synchronization with the patient's cardiac cycle. When the heart is in its relaxed state (diastole), pressure is applied sequentially; distal to proximal, from the lower legs (calves) to the lower thighs and then the upper thighs and buttocks, to propel blood back to the heart. The consequence is an increase in arterial blood pressure during diastole (diastolic augmentation) resulting in increased coronary perfusion pressure and coronary blood flow. Compression of the extremities also results in an increase in venous return to the heart. Just before the heart ejects blood (systole), air is released rapidly from all the cuffs simultaneously to release the externally applied pressure, allowing the compressed vessels to recover to their normal shape, thereby reducing vascular impedance. As a result, arterial pressure during systole is reduced (systolic unloading), as is cardiac workload. The patient's calves, lower thighs and buttocks are wrapped with cuffs containing air bladders. The patient's ECG is monitored via conventional, high-quality electrodes and detection of the R-wave is used to signal the System when to command sequential inflation of the cuffs. The start and duration of inflation, as well as the start of deflation, are adjustable by the Operator, within limits determined by the System. An algorithm is used to prevent the start of inflation during ejection of blood from the heart and to end inflation and begin deflation prior to the occurrence of the next heartbeat. The pressure applied by the cuffs is also adjustable by the Operator from 150mmHg to 300mmHg (for a patient with a heart rate of 60 bpm). The device also utilizes the following cleared components: ECG/EKG and SpO2: K123711