FIELD: medicine. ^ SUBSTANCE: one should study blood DNA for availability of allelic polymorphism in the 5th exon of p53 gene in restrictase Bam RFLP recognition site and at availability of genotype -/-(O/O) one should predict the scope of infarction up to 90 cu. cm at high reliability, at availability of genotype -/+(O/R) - the scope of infarction being above 90 cu. cm. ^ EFFECT: higher accuracy of prediction. ^ 3 ex, 1 tbl