Nonsurgical treatment of Takayasu's disease.
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Adolescent↗
Biomedical subjects
M Tadavarthy
Publications and source records attributed to M Tadavarthy.
A combination of stainless steel coil and compressed Ivalon: a new technique for embolization of large arteries and arteriovenous fistulas.
The abdominal aortas in eight dogs were successfully occluded with a combination of stainless steel coils and compressed Ivalon (polyvinyl alcohol). There was no evidence of recanalization up to six months later. This combination is useful for the embolization of large arteries and arteriovenous fistulas.
Animals↗
The mechanism of balloon angioplasty.
A new theory of the mechanism of percutaneous arterial angioplasty is advanced. For this study, abdominal aortas and coronary, renal, superior mesenteric, and iliac arteries were obtained from cadavers. In addition, the iliac arteries of dogs were dilated and studied. No evidence of significant compression or redistribution of plaques could be found, supporting the theory that atheromatous material is incompressible. Cracking of the intima and separation of it from the media were histologically demonstrated following angioplasty. It is proposed that the stretched media distends following dilatation, carrying with the intima and atheromatous material. Once the media is freed from the encasing effect of the intima, it adapts to the circulatory needs of the body. Beyond a certain point, the arterial widening becomes permanent, due to an overstretching of the muscle fibers, which is demonstrated by a corkscrew deformity of the muscle cell nuclei.
Aged↗
Late hemodynamic and angiographic findings after ascending aorta--pulmonary artery anastomosis.
Ascending aorta-pulmonary artery (Waterston) anastomosis was performed in 75 children, 51 of whom were younger than 1 month of age and 36 younger than 1 week of age at the time of operation. There were 21 operative and eight late deaths. Operative deaths occurred more frequently in infants with complex cardiac conditions and severe hypoxemia and acidosis preoperatively. The postoperative status of the pulmonary arteries or arterioles could not be correlate with the degree of cardiomegaly, the pulmonary vascular markings, or characteristics of the shunt murmur. Sixty-four percent of the patients catheterized had one or more postoperative structural abnormalities of the pulmonary arteries following the operation, most frequently kinking or narrowing of a pulmonary artery. Occlusion of a pulmonary artery occurred in five of 33 patients studied by angiography. Pulmonary vascular disease may also develop. Therefore, patients should be catheterized 1 year postoperatively to evaluate the level of pulmonary vascular resistance and the pulmonary arteries.
Aorta↗
Clinical pathologic conference.
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Female↗