Table 5.7.

Group IIB. Nonstructural fetal heart diseases which may evolve with hemodynamic compromise. Class of recommendation/level of evidence: I C.17,41,57-59

Heart disease	In utero outcome	In utero follow up	Delivery	Postnatal assessment
Cardiomyopathies Arrhythmias Tumors	May evolve with fetal hydrops May require medical treatment	Frequent follow-up (weekly or biweekly), depending on diagnosis and hemodynamic compromise	Vaginal delivery in a level 1 center if well controlled tachyarrhythmias or cardiomyopathies without fetal hemodynamic compromise; Programmed C-section in a level 2 or 3 center in cases of arrhythmia or hydrops which have not been resolved in utero	Cardiac management according to diagnosis Treatment is usually with medication, with the exception of some tumors which need to be removed due to obstructive or compressive character, which compromises hemodynamics