Right atrial MRI mesaurement in operated Fallot. Correlation with major atrial arrythmias
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Right atrial MRI mesaurement in operated Fallot. Correlation with major atrial arrythmias Lamia Ait-Ali1, Maira Levorato Basso2, Daniele De Marchi3, Bruno Murzi4, Massimo Lombardi3, Pierluigi Festa5* From 2011 SCMR/Euro CMR Joint Scientific Sessions Nice, France. 3-6 February 2011 Aim 1) To determine the incidence of Major Atrial Arrhythmias (MAA) in patients after Tetralogy of Fallot repair (opTOF) 2) To correlate MAA to Right Atrium (RA) dimension and other anatomical, functional and clinical findings 3) To propose a new MRI method for the RA measurement. Introduction The main source of morbidity in opTOF emanated from MAA. Intuitively they are related to the RA dimension. Methods 145 consecutive opTOF >12 years old (mean 24±10 years) were evaluated by ECG 24-hour ambulatory monitoring, MR exam, echocardiography, cardiopulmonary exercise test and Amino-Terminal pro-Brain Natriuretc Peptide (NT-proBNP) blood assay. Clinical adverse events and MAA (atrial fibrillation, flutter, or atrial tachycardia) were recorded. RA dimension was assessed by summing the RA diameters on the three main axes (antero-posterior, laterolateral, supero-inferior) from a volumetric MR acquisition and compared to 68 healthy age matched subjects as control.
RV end-diastolic indexed volume (OR 1.022, 95% CI: 1.010 to 1.034, p198 mm indicates a high probability of MAA. Author details 1 IFC- Pediatric cardiology unit, MRI Lab- CNR, Massa-Pisa, Italy. 2Hospital pequeno principe,, Curitiba, Brazil. 3MRI Lab Fondazione FTGM-CNR, Pisa, Italy. 4Pediatric cardiac surgery unit, Fondazione FTGM-CNR, Massa, Italy. 5 Pediatric cardiology unit, MRI Lab Fondazione FTGM-CNR, Massa- Pisa, Italy. Published: 2 February 2011
Results Mean follow-up from primary repair was 23±5 years. RA was significantly dilated in comparison with normal subjects (173 mm ±28 vs 150±20 p
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