Techniques for determining whether a patient will respond to cardiac resynchronization therapy include identifying a plurality of consecutive cardiac beats within a cardiac electrogram of the patient and, for each of the consecutive cardiac beats, measuring a repolarization interval. The methods and apparatuses assign such time slots by first placing the wireless mobile stations into a number of different groups. The opposed section of said joystick is linked by said resilient means to adjustable fixing points. Systems and methods to guide a user through the design of an emblem may include determinations whether an emblem under design is visually distinct from other emblems andor compliant with a set of design rules for emblems. Also provided are processes for making the compounds and plasticized polymer compositions containing said compounds.