PubMed · 10816297
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P S Rao, E B Sideris. 2000. Infant buttoned device.. https://doi.org/10.1002/(sici)1522-726x(200005)50%3A1%3C125%3A%3Aaid-ccd27%3E3.0.co%3B2-l
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A 3.75-year-old castrated male Chesapeake Bay Retriever was referred for evaluation of tachypnea, exercise intolerance, and cyanosis. Echocardiographically, there was severe tricuspid stenosis and right-to-left atrial-level shunting of blood. Marked compensatory polycythemia had developed; the PCV was 75%. Balloon dilation of the tricuspid stenosis was performed. Subsequent echocardiographic examinations demonstrated a reduction in the pressure gradient across the tricuspid valve. The PCV returned to the reference range, and the dog's clinical status improved during the 12 months after the procedure. Tricuspid stenosis is an uncommon lesion in dogs and, in the dog of this report, was assumed to have resulted from tricuspid dysplasia. Cyanosis was a result of right-to-left shunting of blood. Limited treatment is available for dogs with cyanotic heart disease. In this dog, balloon dilation of the stenotic tricuspid valve was palliative.
In 3D real-time MR angiography the reconstruction of images from large raw datasets via Fourier transforms with minimal delays is problematic. In this study strategies for reconstructing time-resolved three-dimensional (3D) datasets at a rate substantially faster than conventional 3D MR image reconstruction were investigated on general-purpose computer hardware. Moderate quality 'preview images' were generated from k-space subsets to reduce image reconstruction times from more than 50 s to 0.3 s per image volume. A blinded review of 3D TRICKS patient examinations showed that these moderate-quality images were sufficient for providing immediate feedback and guiding the subsequent reconstruction of selected time frames (p < 0.05). Fourier projection (reconstruction from a central k-space slice) was the most efficient reconstruction technique. However, the reduction of the reconstructed volume in all three dimensions resulted in higher contrast and better image quality while allowing reconstruction in near-to-real-time (less than 1 s per image volume). The use of such preview images in a real-time system allows for fast feedback from dynamic 3D datasets, enables scanner interaction with minimal latencies and can substantially reduce the postprocessing times.
OBJECTIVE: The aim of this study was to evaluate clinical manifestations, management options, and prognosis for women presenting with gestational trophoblastic tumors with vaginal metastasis. METHOD: Fifty-one patients with vaginal metastases were analyzed retrospectively between January 1985 and September 2000. Vaginal metastasis were documented by physical examination and tissue biopsy. RESULTS: The incidence of vaginal metastasis in choriocarcinoma and invasive mole was 8.6 and 4.1%, respectively. The metastatic tumors were mostly located in the anterior wall of the lower part of vagina. Eighteen patients presented with hemorrhage and rupture. All patients were treated with 5-Fu combined chemotherapy. Vaginal packing was employed to stop bleeding in 16 patients. Three of them received selective angiographic embolization. Vaginal tumors disappeared after chemotherapy. Forty-four patients with complete remission were followed up periodically without evidence of recurrence. CONCLUSIONS: Large or multiple vaginal metastases place the patients at high risk for significant hemorrhage. 5-Fu combined chemotherapy is still a reliable method for treating vaginal metastases. Angiographic embolization is emerging as a successful procedure to control the severe hemorrhage of vaginal tumors.