The importance of the breath-hold test as a method of functional diagnosis of the cardiovascular system

In the clinic of cardiovascular diseases, the methods of functional diagnostics are becoming more and more important every year, since when assessing the state of the cardiovascular system, when determining the ability to work, during professional selection, the data that we obtain using conventional physical research methods (percussion , auscultation, X-ray examination, etc.) are completely insufficient. A number of different methods of functional diagnostics of diseases of the cardiovascular system have been proposed, but none of the proposed tests — simple and complex — based on different principles can fully satisfy us.