Abstract: A patient monitoring device, system and method, based on a neck mounted monitoring harness configured to be capable of operating in a stand-alone mode. The neck-mounted harness is a rigid or semi-rigid U-shaped device, with its own independent processor, power source, and ECG circuitry, configured to be worn around the patient's neck with ECG electrodes, mounted on opposite ends of the U, configured to straddle opposite sides of the patient's sternum near the patient's heart. The device is also configured to interface with other devices such as patient ear worn oximeters and oscillometric blood pressure monitors. The device processor has the capability of independently operating the sensors, analyzing sensor data, and reporting results. The device is also configured to interface with various types of external computerized devices. The device can be configured to help to prepare patients for cardiac CT scans or other imaging scans, and this application is described in detail.