An assembly of devices designed to measure, process, and store electronic data for the interpretation of cardiac physiological parameters received from the output of connected measuring devices (e.g., body surface or intracardiac electrocardiograph (ECG) sensors, transducers, and catheters). The measurements can be compared to pre-established diagnostic criteria for parameters such as cardiac blood flow, electrical conduction, or heart chamber geometry. It typically consists of dedicated workstation, hardware and software that display real-time, three-dimensional (3-D) cardiac maps (e.g., electrical propagation, electrical potential, and cardiac chamber geometry maps), and a catheter.