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