The work deals with determination of the heart parameters prior to and during correction of congenital heart diseases. Analysis of the cardiometric values of 67 normally formed hearts of children aged 0 days to 12 years revealed the most intimate correlative connections with the highest coefficient of multiple determination between heart parameters in all age groups. The connection between some parameters is lost after the age of 3 years. Multidimensional correlative-regressive analysis showed that the relationship between the heart parameters may be expressed by linear functions. Their dependence may be represented by the equation y = b0 + b1x1 + b2x2. The needed heart parameter may be determined proceeding from one or two known parameters by programming on a computer, angiocardiographically, echocardiographically or directly during correction of the congenital heart disease using result tables of multidimensional correlative-regressive analysis.