**4. Stages of operation Ozaki**

1.A known method of forming the leaflets of the aortic valve, cut after intraoperative measurement of intercommissural distances (**Figure 7**). The length of the

**Figure 7.** *Forming cusps from pericardium.*

free edge of each nonvalve should be 20% greater than the intercommissural distance, the valve height is 0.866 of the intercommissural distance. The leaflets are fixed to the aortic ring with a continuous suture (**Figure 8**). The disadvantage of this method is the absence of the results of the application of this technique in clinical practice described in the literature.


**Figure 8.** *Final view of the operation.*

### *Acquired Aortic Valve Diseases (Current Status of the Problem) DOI: http://dx.doi.org/10.5772/intechopen.113014*

#### **Figure 9.**

*Classic surgery: Aortic valve replacement and aortic valve leaflet plasty.*

4.The classic operation – replacement of the aortic valve with artificial prostheses (**Figure 9**), is the most common method of surgical correction of aortic heart defects to date [21].

#### **4.1 Endovascular aortic valve replacement**

Here it is necessary to indicate the importance of choosing an aortic valve prosthesis, since the last decades have been marked by the rapid development of the production of biological valves, frameless, framed biological aortic valves, homografts, the use of biological valves for endovascular methods of aortic valve implantation, and many others [22–24].

But, I think our task is to determine the basics of the correct surgical tactics for the treatment of aortic heart defects, indicating the main methods for diagnosing these heart defects. To this end, we briefly want to acquaint the reader with the basics of the pathogenesis of the development of pathology, the anatomical and hemodynamic foundations of aortic heart defects [12, 25].

In recent decades, the technology of endovascular implantation of an artificial aortic valve has been developed (**Figure 10**).

The next high-tech operation is endovascular implantation of aortic valve prosthesis [22, 23, 26]:

**Figure 10.** *Transcatheter aortic valve implantation.*
