  Experiments that discuss influence of noise to H. Seidel and H. Herzel
dynamics model of human cardiovascular system are presented. Noise is
introduced by considering stochastic delays in response to the sympathetic
system. It appears that in the presence of the noise 10 s heart rate
oscillations connected with Mayer waves are preserved. Moreover the heart rate
becomes approximately normally distributed (even in unstable phase of original
Seidel Herzel model), similarly like the real RR intervals data.
