The invention relates to a method for determining cardiac conduction, in particular the cardiac conduction of a subject, the method including: (i) providing induced sinoatrial bodies (iSABs) comprising cardiac pacemaker cells； (ii) providing working myocardium cardiomyocytes, in particular working myocardium cardiomyocytes of the subject； (iii) measuring the cardiac conduction； wherein the induced sinoatrial bodies according to (i) and the working myocardium cardiomyocytes according to (ii) are spatially separated but arranged in conductive communication with one another.
