ABSTRACT
Long QT syndrome is a high-risk condition associated with arrhythmia due to its sudden cause of death. Prenatal diagnosis of long QT syndrome, however, is impossible using the fetal echocardiogram. Here we present the first reported case of long QT syndrome in which a prenatal diagnosis was made using non-invasive fetal electrocardiogram. We consider that the non-invasive fetal electrocardiogram may be a good method for diagnosing fetal QT prolongation.
Subject(s)
Electrocardiography , Long QT Syndrome/diagnosis , Prenatal Diagnosis/methods , Adult , Female , Gestational Age , Humans , Infant, Newborn , Long QT Syndrome/congenital , Male , PregnancyABSTRACT
Pure fatty tumors of the uterus are extremely rare and usually develop in postmenopausal women. We present the first reported Japanese case of a pure uterine lipoma, in which a preoperative diagnosis was made by magnetic resonance imaging (MRI) and was pathologically confirmed postoperatively. As in our case, MRI is currently the best modality for determining the internal architecture of a tumor and the presence of fat. Because of the benign nature of a uterine lipoma, such an approach can avoid unnecessary surgery in asymptomatic patients.
Subject(s)
Lipoma/diagnosis , Uterine Neoplasms/diagnosis , Female , Humans , Japan , Lipoma/pathology , Lipoma/surgery , Magnetic Resonance Imaging , Middle Aged , Tomography, X-Ray Computed , Ultrasonography , Uterine Neoplasms/pathology , Uterine Neoplasms/surgeryABSTRACT
Once the fetal electrocardiogram (FECG) waveforms from ECG on the maternal abdomen are detected, the fetal P wave and T wave cannot always be identified by using continuous wavelet transform (CWT). We took noninvasive FECG from the maternal abdomen, extracted it from the maternal electrocardiogram waveforms after an Independent Component Analysis (ICA), and identified the features of those waveforms by using CWT. We also simultaneously analyzed the observed signals by Primary Component Analysis (PCA). FECG has been extracted by ICA from 25 of 30 pregnant women. The fetal P wave and T wave could be identified in 21 of the 25 cases. FECG was extracted by PCA in only one case. ICA is superior to PCA, whose separation quality highly depends on the careful positioning of the electrodes. We believe that after ICA, FECG obtained by the wavelet theory based method will become a powerful tool for the differential diagnosis of fetal arrhythmias.
