Abstract #4452

Relative Pressure Measurement in Thoracic Aorta and Pulmonary Artery of Healthy Volunteers and Repaired Tetralogy of Fallot Patients Using the 4D Flow Sequence of Cardiac Magnetic Resonance

Jess Urbina¹,², Julio Sotelo²,³, Marcelo Anda²,⁴, Cristin Tejos,³⁵, Daniel Hurtado⁵, Pablo Irarrzabal,³⁵, Sergio Uribe,⁴⁵

¹Medical School, Pontificia Universidad Catlica de Chile, Santiago, Chile; ²Biomedical Imaging Center , Pontificia Universidad Catlica de Chile, Macul, Santiago, Chile; ³Electrical Engineering Department, Pontificia Universidad Catlica de Chile, Macul, Santiago, Chile; ⁴Radiology Department, Pontificia Universidad Catlica de Chile, Santiago, Chile; ⁵Biomedical Imaging Center, Pontificia Universidad Catlica de Chile, Macul, Santiago, Chile

In this work we propose to use 4D Flow sequence to obtain and compare pressure maps in Ao and PA of healthy volunteer and patients with rTOF. rTOF patients had relative pressure differences between maximum and minimum values higher than volunteer in PA (P<0,05). Additionally, relative pressure of the Ao shown in this work had excellent correlation with other published values using 4D Flow and catheterization. The differences of maximum and minimum relative pressures in TOFr patients could be a novel parameter that can be used to study right ventricular function.