Delayed fracture of a PFM Nit-occlud Flex coil after transcatheter occlusion of patent ductus arteriosus

We report the fracture of a 4x4 Nit-Occlud pfm coil in a child with patent ductus arteriosus [PDA], bicuspid aortic valve, and coarctation, detected three years after deployment without any adverse consequent. This report emphasizes the importance of adherence to the user guidelincs of the company for the implementation of the device and also shows the significance of lateral chest X-ray in the follow-up of patients after the occlusion of the PDA, particularly in the case of using smaller-sized, frail pfm coils for the detection of coil fracture

Normal values of doppler derived right ventricular myocardial perfomance index in neonates

Doppler-derived Myocardial Performance Index [MPI] is defined as the sum of isovolumetric contraction and relaxation durations divided by ejection time. It is an easily measured and reproducible index that shows both systolic and diastolic myocardial function. The goal of this study was to define normal values of right ventricular MPI in neonates in the first 48 to 72 hours of life. Patients and Fifty-one quite or asleep healthy and term neonates underwent complete M-mode, two-dimensional color-doppler echo-cardiography examination and RV MPI was calculated for them. Statistical analysis was performed, using SPSS software. P values less than 0.05 were considered as significant. RV MPI was 0.23 +/- 0.14 in healthy neonates. No correlation between RV MPI and either age or weight of the newborn infants was found. RV MPI in healthy neonates was 0.23 +/- 0.14 in our study. While this closely resembles to the results of some researches, but is lower than those previously reported by the other investigators in healthy children. The lower value of RV MPI in neonates can be possibly explained by the higher pulmonary arterial pressure of the lower ventricular mass in the first few days of life in neonates. Further studies for evaluation of the effect of pulmonary arterial pressure and right ventricular mass on RV MPI is recommended

Doppler-derived right ventricular myocardial performance index in neonates: Normal values

Doppler-derived myocardial performance index [MPI], defined as the sum of isovolumetric contraction and relaxation durations divided by ejection time, is an easily measured and reproducible index that shows both systolic and diastolic myocardial function. The goal of this study was to define normal values of right ventricular MPI in neonates in the first 48 to 72 hours of life. Fifty-one quiet or sleeping healthy and term neonates underwent complete M-mode, two-dimensional color-Doppler echocardiographic examination and RV MPI was calculated in them. Statistical analysis was performed using SPSS software. A P value less than 0.05 was considered as significant. RV MPI was shown to be 0.23 +/- 0.14 in healthy neonates. There was no correlation between RV MPI and either age or weight of the newborn infants. While this value closely resembles the results of some researchers, it is lower than that previously reported by other investigators in healthy children. The lower value of RV MPI in neonates may be possibly related to the higher pulmonary arterial pressure or right ventricular mass in the first few days of life in neonates. Further study to evaluate the effect of pulmonary arterial pressure and right ventricular mass on RV MPI is recommended