An evoted examination method of heart rate variability (HRV) with standard successive loads is presented here. Through three different loads and the biofeedback relax training, it can show the state of autonomic nerve functions, as well as the improved efficacy of autonomic nerve functions by biofeedback relax training. In this paper, we present a comet-like “Lorenz scattered pattern”and raise an idea that it is an ideal method to evaluate autonomic nerve functions synthetically. It s major axis represents ...