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Ballistokardiografiya

Ballistokardiografiya – the method of a research of hemodynamic action of the heart which is based on graphic registration of the changes of position of a body of the person caused by reductions of heart and movement of blood in large vessels. Types of a ballistokardiografiya: vector; high-frequency (seismic at which mechanical oscillations of rather high frequency – 10 Hz and more are registered); dynamic (Xing. a dinamoballistokardiografiya, a form indirect B at which communication of the body investigated with a platform many times over exceeds communication of a platform with the earth); local (at which there is a registration of movement of any part of a body – the head, a breast, etc.); indirect (based on registration of movement of the bodied platform system); low-frequency (seismic, registering mechanical oscillations less than 10 Hz); the general (allowing to register the movements of all body); straight line (at which are registered movement only of the body inspected or its any part); seismic (indirect, Xing. a seismocardiography at which communication of a body with a platform, slightly exceeds communication of the last with the earth).

 
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Stomatologists appeared relatively recently. In the 19th century to pull out painful teeth belonged to duties of the ordinary hairdresser.