Fig. 9From: A real-time system for selectively sensing and pacing the His-bundle during sinus rhythm and ventricular fibrillationThe basic waveshape used for pacing consisted of 1-ms positive phase, a 0.2-ms blanking period, and a 1-ms negative phase. The remaining blank period time (t) was determined by the frequency of pacing (F), which may be fixed or determined from the activation rate at an electrode. Amplitude (A) is the current amplitude and is adjustableBack to article page