**3.5 Radionuclide studies of the myocardium in aortic disease**

Radionuclide myocardial scintigraphy is used in evaluating the results of surgical correction of aortic heart defects.

With AS, LV wall tension occurs, which leads to coronary microcirculatory dysfunction. Scintigraphically after surgery, most patients show an improvement in myocardial perfusion.

**Figure 5.** *Magnetic resonance imaging (MRI) of the heart.*

**Figure 6.** *Radionuclide myocardial scintigraphy of myocardium.*

The above research methods (**Figure 6**) are performed in almost all specialized cardiology and cardiac surgery institutions, where they thoroughly deal with the problems of modern diagnostics and the solution of surgical tactics for the treatment of acquired aortic heart defects. We only considered it necessary to briefly dwell on the problems of diagnosing and determining the surgical tactics of acquired aortic valve defects, knowing that dynamically these issues are resolved individually, depending on the capabilities of clinics and specialists involved in "adult cardiac surgery" at the present stage.

#### **3.6 Surgical methods for the treatment of aortic heart disease**

The requirement of modern cardiac surgery is the widest possible use of valvesaving technologies in heart valve surgery, namely in the surgical treatment of aortic heart defects. However, as is known from the specialized literature, according to the leading authors of the post-Soviet period of development, the opinion remained that valve replacement operations were preferable in surgery for aortic heart defects, in view of the peculiarities of hemodynamics, the relationship of the left heart and the aortic valve. Therefore, the preferential performance of prosthetic aortic valves rather than plastic reconstructive interventions during these periods is explained. But, the trend towards the implementation of valve-saving technologies is especially noticeable in recent decades, when the development of a number of plastic interventions on aortic valves began [15–18]. It is appropriate to bring plastic surgeries, such as "Open valvuloplasty of the aortic valves" with stenosis, or preferential preservation of the structure of the valve, without gross morphological changes (calcification, gross fibrosis, etc.). Performing parietal resection of thickened leaflets with the addition of commissural sutures in case of fibrous change, stenosis or predominant stenosis of the aortic valves. It should be noted that they were performed with a normal tricuspid aortic valve structure. There are many attempts to perform plastic operations on the aortic valves. However, many of them did not have sufficiently stable good long-term results and required repeated valve replacement operations in a short period of postoperative follow-up. I think that among the many methods of plastic surgery on aortic valves, the following deserve attention:

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

1.There are several modifications of Operation Ozaki. The author's methods, the meaning of which is in the complete reconstruction of the aortic valve from the autopericardium or from the xenopericardium, differ in the types of meters and templates. So, for example, the Benaki operation uses gauges made from the flexible material nitinol, as opposed to the rigid Ozaki gauges. Due to the special properties of this material, gauges can be modeled, giving them the desired shape and allowing more convenient measurement of the distance between the commissures, then they are also used as templates for cutting the leaf. In addition to improved meters, Benaki's operation uses special "three-armed" forceps for the comfort of creating aortic valve neocusps [7]. Known special holding device for the formation and simultaneous plastics of the aortic valve leaflets (MAAZOUZI APS AORTIC PLASTY-SIZER). In the work of A.S. Nesmachny describes in detail the technique of using the device in clinical practice [7, 16, 19].

The positioning of future leaflets in the holding device before implantation allows quickly and accurately, in accordance with the diameter of the aortic annulus, to form a neovalve*.*
