Investigation of Pulmonary Valve Replacement Cases after Previous Tetralogy of Fallot repair

The aim of this study was to investigate pulmonary valve replacement cases after previous TF repair. This study conducted in Rajaei cardiovascular medical and research center during 2004 -2011. We collected the information including CI (cardiac index)، (left ventricular ejection fraction) LVEF، (left ventricular end systolic volume index) LVESVI، (left ventricular end diastolic volume index) LVEDVI، (right atrial pressure) RA pressure، RVEF (right ventricular ejection fraction)، (right ventricular end systolic volume index) RVESVI، RVEDVI (right ventricular end diastolic volume index)، tricuspid regurgitation grade، Net forward flow and Pulmonary regurgitated fraction Totally there were 28 cases of PVR. There were 18 and 10 cases of mechanical and biological valves. In comparison between PVR and non PVR cases, the severity of right ventricular dysfunction was higher in PVR cases. The transanular patch was the most commonly used method for repairing TOF, it was used 69. 7% and 47. 4% in PVR and non PVR cases respectively, and this difference was significant. There were significant improvements in severity of pulmonary stenosis before and after PVR, severe PS were 35. 7 and 20% before and after PVR respectively. There were also significant improvements in PAP after PVR (21. 3 and13. 5 before and after PVR respectively) It seems that using transanular patch in repairing TOF is a risk factor for PI which leads to PV. Delay in PVR operation can increase the severity of RV dysfunction and frequency of arrhythmia.