geometrical point structure significantly different than the club geometry in the form of a trapezium in three dimensional orientation if only two successive rr intervals are respectively plotted on a two dimensional diagram then the general triangular point structure shown in fig4 is formed this biophysical conformity to law forms the basis for the technical structure of the measuring apparatus from the ecg a list of the measured rr intervals is stored and these are used to produce a virtual electronic preferably two dimensional scatter plot using a pre programmed algorithm the virtual scatter plot is electronically checked for the presence of a corresponding point structure in the two dimensional representation of the triangle structure and if the pattern correlates with one associated with atrial fibrillation a visual or audible indicator is given to identify the risk of possible atrial fibrillation which is imminent or is already occurring the measuring apparatus can be designed to be a lightweight easily portable electronic unit which does not bother the patient much during the measuring time the measurements can be taken by the patient independently and regardless of the respective location the display of the result of analysis is simple which means that the patient can immediately identify his health status and can immediately go to.