Ultrastractural alterations of right and left ventricular myocytes in tetralogy of fallot.

Progression of right ventricular dilation in repaired tetralogy of fallot

PURPOSE To evaluate factors associated with rapid rate of progression (ROP) of right ventricular (RV) dilation by cardiac MRI in repaired tetralogy of Fallot (TOF) patients. MATERIALS AND METHODS All patients with repaired TOF with two MRIs were included. RV volumes and function were assessed by MRIs performed on a GE 1.5 Tesla (T) platform. The ROP of RV dilation was calculated as the differ...

Right ventricular strain in patients with tetralogy of Fallot

Background Left ventricular (LV) circumferential strain shows cardiac dysfunction earlier than ejection fraction. However, measuring right ventricle strain is technically challenging due to the thin RV wall and complex morphology. Also, the predominant RV strain is longitudinal, whereas the predominant LV strain is circumferential. We recently validated a feature tracking algorithm for evaluati...

Quantifying regional right ventricular function in tetralogy of Fallot.

Right ventricular (RV) function is notoriously difficult to quantify. Patients with tetralogy of Fallot (TOF) have decreased systolic performance. We measure regional RV performance using MRI with 1-dimensional myocardial tissue tagging. By tagging cine-MRI in two views, we measured regional shortening in 12 regions throughout the RV. We image 32 pediatric patients: 21 normal patients and 11 pa...

Tetralogy of Fallot presenting with Right Ventricular Failure.

A 32 year old male patient was admitted with exertional dyspnea for long duration with features of right sided failure. On examination, it seemed to be a congenital cyanotic heart disease with decrease pulmonary flow. Echocardiography showed a malaligned VSD with pulmonary stenosis with severe AR and the total regurgitation volume was going to the RV instead of going to both the ventricles lead...

Assessing ventricular scar in tetralogy of Fallot.