[The effect of an extracranial occlusive lesion of the branches of the aortic arch on the status of the intracranial circulation].

Unilateral occlusion of extracranial cerebral arteries results in asymmetric intracranial flow rate against unaffected regional tissue circulation. Multiple occlusions entail reduction of intracranial circulation even in satisfactory collateral circulation. Reduction of tissue cerebral circulation occurs in well-defined occlusive processes with decompensated collateral circulation in the absence of carbogenic vascular responses.

[Regional cerebral blood flow as dependent on the nature of the occlusive lesion of the branches of the aortic arch].

A 133Xe radionuclide investigation was employed for examination of regional cerebral circulation with 5% carbogen mixture loading in patients with occlusions of the aortic arch major arteries. It was established that a positive response to carbogen mixture inhalation indicates a compensated cerebral circulation irrespective of the arterial lesion type and number. The negative vascular response is associated with uni- or bilateral reduction of the regional cerebral circulation depending on the type and severity of the arterial involvement.

[The function of the heart ventricles in patients with a lesion of the aortic arch branches].

Radionuclide equilibrium ventriculography was used to examine general and regional ejection fractions and velocity characteristics for both cardiac ventricles in 28 patients with occlusions of the aortic arch branches consequent to aortic arteritis of atherosclerosis. In nonspecific aortic arteritis (NAA) even young patients have myocardial dysfunction comparable to that in the elderly with atherosclerosis. However, as shown by the nitroglycerin test, these patients preserve functional reserves of the myocardium.

[Radiodiagnosis of echinococcosis of the lungs].

The paper is devoted to analysis of radio-diagnostic findings of 79 patients with parietal round pulmonary formations. All the patients were investigated by x-ray and ultrasound, perfusion scintigraphy of the lungs with a postural test was performed in 43 of them. Diagnostic x-ray and echographic methods were compared and evaluated in terms of defining the origin of pulmonary formations.

[Roentgeno-endovascular dilation of aortic coarctation].

The potentialities of roentgeno-endovascular dilation (RED) of various types of coarctation and aortic stenoses were studied in 12 patients aged 9 to 27. RED was performed by two Grüntzig's catheters with balloons not less than 7 mm in diameter. The main criterion of RED efficacy was a gradient of systolic pressure which was on the decrease by 25-40 mm Hg after using one catheter, and by 40-70 mm Hg after using both catheters.