Peripartum cardiomyopathy in the modern sense is an exception. The European Society of Cardiology (ESC) working group defines the disease as "idiopathic cardiomyopathy, represented by heart failure due to systolic dysfunction of the left ventricle, which occurred at the end of pregnancy or within a few months after delivery. The disease is accompanied by a high mortality rate, according to various sources, 4-28 %.