ABSTRACT
A 46-year-old man who had been hospitalized for treatment of pneumonia was referred to our hospital with a diagnosis of acute pulmonary thromboembolism. Multi-detector row computed tomography revealed massive thrombi in the bilateral main pulmonary arteries. Transthoracic echocardiography showed dilated right heart chambers and a large floating thrombus in the right atrium. Emergency thromboembolectomy was performed. Although fresh thrombi were removed from the right atrium and left main pulmonary artery, organized old thrombi were present in the bilateral pulmonary arteries, leading to a diagnosis of chronic thromboembolic pulmonary hypertension. Because no instruments were available for pulmonary endarterectomy, the surgery was terminated with percutaneous cardiopulmonary support. Five days postoperatively, pulmonary endarterectomy was performed under deep hypothermic circulatory arrest. The postoperative course was uneventful, and the patient returned to his preoperative lifestyle without the need for oxygen support.
ABSTRACT
<p>A 46-year-old man who developed fever and general fatigue was referred to our hospital with suspicion of infective endocarditis. A ventricular septal defect had been previously diagnosed. Transthoracic echocardiography revealed vegetation on the aortic, mitral, and pulmonary valves, and each valve had significant regurgitation. An emergency operation was performed because of congestive heart failure. The aortic and mitral valves were replaced with mechanical valves. The pulmonary valve was repaired ; the anterior leaflet was resected and replaced by glutaraldehyde-treated autologous pericardium. The patient's postoperative course was uneventful. Recurrence of infection was not observed for 3 years after the operation. Triple-valve endocarditis, especially that involving a combination of the aortic, mitral, and pulmonary valves, is rare. Involvement of multiple valves on both sides of the heart may be attributed to a congenital intracardiac shunt. Early surgical intervention may be useful to control infection and heart failure, as in the present case.</p>
ABSTRACT
Ipomoea carnea promotes in livestock a toxicosis histologically characterized by vacuolated cells in different organs. The toxic principles of I. carnea are the alkaloids swainsonine and calystegines B1, B2, B3 and Cl. However, it has not been determined whether the effects observed in rats treated with this plant are only due to swainsonine or if the calystegines have some additive toxic effect. Thus, the aim of the present study was to evaluate in rats the toxic effects of the L carnea aqueous fraction (AF) and of its different alkaloids when administered individually at the same concentration as in this fraction, for 14 days. No anorexic effect and/or alteration in body weight was observed in any group. The histopathologic study showed that while calystegines did not produce any toxic effects, swainsonine and I carnea AF promoted vacuolation in different organs, being more severe in the animals from the I. carnea AF group and extensible to other organs evaluated. No alterations were detected in the central nervous system of rats of any group assayed. The results obtained here suggest that calystegines may act as coadjuvants of swainsonine in I carnea toxicosis; however, little can be proposed about the neurotoxic effect of I. carnea since rats did not prove to be a good model for the reproduction of neuronal storage disease.
