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Biomedical subjects

A Formanek

Publications and source records attributed to A Formanek.

At least 37 records · Page 2Linked to original sources
PubMed1980

The angiographic appearance of intrarenal leiomyoma.

Two benign leiomyomas are described together with their radiographic and sonographic appearance, and the literature is reviewed. In large, asymptomatic renal masses, which are well circumscribed on angiography, a benign intrarenal leiomyoma may be considered. Nonechogenicity and relatively good through-transmission seem to substantiate the diagnosis.

Angiography↗
PubMed1980

Therapeutic blockade of arteries using compressed Ivalon.

A new technique for embolization with compressed Ivalon plugs is described. Fourteen arteries--six renal, three splenic, two pulmonary, one left gastric, and two abdominal aortas--were occluded in six dogs. In one case of renal artery embolization, three plugs were used, and in one case of abdominal aorta embolization, two were needed for total occlusion. In all other cases only one plug was used. Total occlusion was angiographically demonstrated up to five months following embolization in all but one case. In this case, recanalization was thought to have occurred because of overcompression of the Ivalon plug.

Animals↗
PubMed1980

Routine magnification lymphangiography with a swinging slot X-ray machine.

Bilateral pedal lymphangiography was performed in 85 patients. Anteroposterior, lateral, and oblique views of the pelvis and abdomen were obtained with conventional radiographic technique and compared with 1.8 X magnification views obtained with a radiographic scanner that had a multiple slot system and with magnification views obtained with a standard 0.3-mm focal spot and a 12:1 grid.

Humans↗
PubMed1980

Selective coronary arteriography in children.

Anomalies and disease processes of the coronary arteries in children are uncommon. However, with the recent advances in cardiac surgical techniques, many of these lesions are amenable to surgery that requires accurate anatomic delineation by angiography. Ascending aortography is the angiographic procedure commonly used to image the coronary arterial anatomy in children. In some instances this procedure fails to show the extent or nature of the pathologic process. In some cases, selective coronary arteriography is essential for successful management. Twelve patients are presented in whom selective coronary arteriography was indicated, and its value is compared with that of nonselective angiography. Indications for selective coronary arteriography in children are given, and its complications are also discussed.

Adolescent↗
PubMed1980

Persistent truncus arteriosis associated with interruption of the aortic arch.

Five patients with a combination of truncus arteriosus and interruption of the aortic arch are reported. The combination of those defects significantly increases the surgical risk. This rare cardiac malformation can only be diagnosed radiographically. An aberrant right subclavian artery is present in 25% of patients. It is helpful in suspecting the diagnosis from plain films of the chest. The diagnosis can be made from a ventriculogram, but usually a truncogram is necessary to define the anatomy of the aortic arch.

Adolescent↗
PubMed1980

Vascular pseudotumors of the kidney.

Eleven cases of vascular pseudotumors were reviewed and grouped into four categories according to clinical and radiological findings. On the IVP we found two patterns of filling defects: [1] Smooth indentations or filling defects in AV fistulas and renal artery aneurysms and also in the case of a congenital AV malformation due to an enlarged draining vein. [2] Multiple mottled filling defects caused by collaterals in stenoses of renal artery branches. This appearance is also described in the literature for congenital AV malformations. The angiographic findings in each of the four categories are discussed. The role of angiography is stressed as the diagnostic test of choice to establish the correct diagnosis of these benign lesions and to define optimal treatment.

Adult↗
PubMed1979

Coarctation of the abdominal aorta.

Coarctation of the abdominal aorta is an uncommon process but an important cause of systemic hypertension. Angiography is the investigation of choice to establish a diagnosis and document the extent of involvement. However, angiography does not provide an etiological diagnosis; and it may not be possible to distinguish an acquired coarctation from a congenital process. Three patients with coarctation of the abdominal aorta are presented.

Adolescent↗
PubMed1979

Primary liver tumors in the pediatric age group: an angiographic challenge.

Eleven children, ranging in age from three months to fifteen years, with primary liver tumors were examined by large volume direct magnification arteriography (2.5--3 ml of contrast material per 1 kg body weight for a single selective study). The following tumors were found: hepatoblastoma (1), hepatocellular carcinoma of the adult type, hepatoma (3), infantile hemangioendothelioma (4), hemangiosarcoma (1), focal nodular hyperplasia (1) and cystic mesenchymal hamartoma (1). Some of the tumors have a quite typical angiographic appearance as infantile hemangioendothelioma, hemangiosarcoma, cystic mesenchymal hamartoma. The other highly vascular neoplasms show unspecific signs of vascular malignant tumors; subtile angiographic signs may, however, be present and help in the differential diagnosis.

Adolescent↗
PubMed1979

Radiological evaluation of composite aortic grafts.

Aneurysm of the ascending aorta with aortic regurgitation is most commonly caused by cystic medial necrosis. Replacement of the aortic valve and diseased aorta with a composite graft and re-implantation of coronary arteries is the surgical treatment of choice at the authors' institution. The most important late complication of this procedure is hemorrhage at the anastomotic sites. Radiology plays an important role in the management of these patients. The angiographic appearance of cystic medial necrosis and the radiological features and postoperative complications of composite grafts in 15 patients are described.

Adolescent↗
PubMed1979

The "ring sign" of necrotic pheochromocytoma.

Pheochromocytomas are usually hypervascular tumors exhibiting dense stain during angiography. The cystic nature of the neoplasm or tumor necrosis can result in failure of opacification of the mass or a central lucent area. Four cases of pheochromocytoma are described where a central avascular zone was surrounded by a dense rim of contrast, giving a "ring sign." Since this appearance is best seen in the capillary and venous phases, delayed films are essential.

Adolescent↗
PubMed1979

An essential view in coronary arteriography.

A significant stenosis of the left main coronary artery is associated with a significant mortality and is one of the major indications for aortocoronary bypass surgery. The diagnosis of this lesion on clinical grounds is inconsistent and should be established by angiography. All routine projections during coronary arteriography cause foreshortening of the left main coronary artery. Well-collimated anteroposterior and shallow right and left anterior oblique views show the main segment best. These views also show the proximal segments of circumflex and anterior descending branches, and should be routinely used during every coronary arteriogram.

Coronary Angiography↗
PubMed1978

Complications of wedge hepatic venography.

During wedge hepatic venography, mechanical injection should be accomplished at the lowest possible rate in order to avoid hemorrhagic infarction. Small amounts of contrast material should be administered. Hepatic angiography may result in an area of tumor blush at the site of a previous wedge injection.

Animals↗
PubMed1978

A new, simple test for renin sampling.

In 8 of 18 patients with suspected diagnosis of renovascular hypertension, the resting renin values were inconclusive. However, following tourniquet stress, the values became positive. Sixteen of 18 patients showed significant decrease in blood pressure following surgery. The procedure was well tolerated, and its routine use is recommended.

Adolescent↗