RESUMO
Phonoangiography (PAG) was applied to study the extracranial parts of cerebral blood vessels in 16 symptom-free healthy individuals and 92 patients with cerebrovascular disorders. The conductance of cardiac tones to the cerebral arteries was assessed in comparison between PAG and phonocardiography. Correlations were found between the arterial wall elasticity, luminal changes and heart sounds conduction. As the atherosclerotic changes increased in arteries under study, the tones conductance velocity increased and their amplitude decreased. With the vascular tone reduced, the heart sounds conduction velocity decreased and their amplitude increased. The 1st and 2nd tones displayed differential increase in conduction velocity in distorted and dilated arteries. PAG vascular bruits were characteristic hemodynamic disorders.
Assuntos
Transtornos Cerebrovasculares/etiologia , Adulto , Arteriopatias Oclusivas/complicações , Arteriopatias Oclusivas/diagnóstico , Arteriosclerose/complicações , Arteriosclerose/diagnóstico , Malformações Arteriovenosas/complicações , Malformações Arteriovenosas/diagnóstico , Doenças das Artérias Carótidas/complicações , Doenças das Artérias Carótidas/diagnóstico , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Fonocardiografia , Artéria Subclávia , Artérias Temporais , Artéria VertebralRESUMO
A method for joining vessels by means of argon laser, i. e. by "laser welding" was developed. It was proved in experiment that endothelium formation is more adequate in a vascular microsuture formed by laser welding than in the formed by the traditional thread method. Forty one operations for creating an extraintracranial microanastomosis were found by laser welding. The prospective clinical effect was positive in 36 patients. Control angiograms demonstrated good patency of the created microvascular anastomosis.