This paper describes a body area network for measuring an electrocardiogram signal and transmitting it to a smartphone via Bluetooth for data analysis. The body area network uses a specially designed planar inverted F-antenna whose design prioritizes size, cost and efficiency. Due to the human body's electrical properties, the antenna was designed to enable surface wave propagation around the body. The system utilizes the user's own smartphone for data processing, while the built in communications can be used to raise an alarm if a heart attack is detected. This is managed by an application for Andriod smartphones that has been developed for this project. The system works for all defined user cases.