The authors have studied chronobiological features of the beats and ciliary arrhythmia of patients who suffer from ischemic cardiac disease, rheumatism and chronic obstructive lungs diseases using original methodical procedures to analyze electrocardiograms. Having detected essential distinctions in parameters under study for both rhythm disturbances, they showed that at patients having ischemic cardiac disease under extrasystolic and ciliary arrhythmia certain time parameters had corresponded to golden section proportion that had not been observed under rheumatism and lungs diseases. A special emphasis was placed on the necessity of further inquiry into the nature of nosologic chronobiological heterogeneity of heart rhythm disturbances.