The purpose of this prosective and retrospective observational study is to analyze the clinical and echocardiographic characteristics of infants with prenatal diagnosis of suspected aortic coarctation (CoAo) in order to identify clinical and instrumental elements that can predict the risk of developing aortic coarctation in the neonatal period so that we can identify patients who are at high risk and would therefore require intensive care and observation; compared with low-risk patients, for whom early discharge would be evaluable.

Our study has the intention of analysing the clinical and echocardiographic characteristics of infants with prenatal and neonatal diagnosis of suspected CoAo, transferred at birth to the O.U. of Cardiology and Paediatric Cardiac Surgery at the Policlinico di Sant' Orsola in order to identify reliable predictors of CoAo, in particular reliable in presence of the ductus arteriosus of Botallo.

It is an observational study: patients participating in the study will not undergo to any procedures outside the normal clinical practice; likewise, the clinical variables that will be collected for study are those that are commonly collected by the physician in daily clinical practice. This study therefore involves the observation of current clinical practice without the application of any kind of 'intervention'.The primary objective of the study is:

to identify the clinical and/or echocardiographic features predictive of the development of Aortic Coarctation through the creation of a data collection with which to census all patients with a diagnosis of suspected or overt Aortic Coarctation, admitted from 01/01/2007 to 31/12/2026 at the Paediatric Cardiology and Cardiac Surgery Centre of the Policlinico di Sant'Orsola, Bologna.

Inclusion Criteria:

• Patients with pre-natal or post-natal diagnosis of aortic coarctation from 01 January 2000 until approval (retrospective phase) and from approval until 31 December 2026 (prospective phase)

Exclusion Criteria:

• Patients whose diagnosis of aortic coarctation is postnatal, considered to be >1 month after birth
• prenatal diagnosis of genetic disease (e.g., Turner's Sdr)
• coarctation in the setting of complex congenital heart disease

All patients with suspected prenatal diagnosis of aortic coarctation, referred to our next center from 01 January 2000 to 31 December 2026 will be considered going to include, according to a preliminary analysis, a cohort of about 150 patients.