ISSN : 1301-5680
e-ISSN : 2149-8156
TURKISH JOURNAL OF
THORACIC AND
CARDIOVASCULAR SURGERY
Turkish Journal of Thoracic and Cardiovascular Surgery     
Ozaki Procedure: 1,100 patients with up to 12 years of follow-up
Shigeyuki Ozaki1
1Department of Cardiovascular Surgery, Toho University, Ohashi Medical Center, Tokyo, Japan
DOI : 10.5606/tgkdc.dergisi.2019.01904

Ozaki procedure or aortic valve neo-cuspidization basically includes replacement of aortic valve cusps by three native autologous pericardial cusps. Its midterm outcomes have been published previously.[1] This video article presents the operative technique in a stepwise method.[2]

In our clinic, this operation was performed during 12 years from April 2007 to March 2019, and more than 1,100 patients were operated. The mean age of the patients was 67.7±14.9 years. The etiology was aortic stenosis in 61.7%, aortic insufficiency in 31.1%, and both in 7.2% of the patients. The mean aortic cross-clamp and cardiopulmonary bypass times were 106.1±30.3 and 151.3±36.9, respectively. The overall survival rate is 84.6% and freedom from reoperation is 95.8% at 12 years.

This technique can be applied in patients with aortic stenosis, aortic regurgitation, infective endocarditis, and prosthetic valve endocarditis and those with non-tricuspid aortic valve with a similar method. The main strengths of the technique are the immediate superb hemodynamics after the operation and no anticoagulation requirement postoperatively. Regarding to the operative technique, there may be some additional points to be considered:

1. During the sizing of the cusps, the larger one should be selected, if one small or larger one does not exactly fit the sizer.

2. A bovine pericardium can also be used in selected patients, if native pericardium is not available. No calcification issue was experienced in our series.

3. A learning period usually includes the first 20 patients for such operation; therefore, the set up and technique should be supervised in the beginning.

4. If the difference between the sizing of each cusps is more than 2 mm, a new commissure should be created to prevent misalignment between the cusps.

Declaration of conflicting interests
The authors declared no conflicts of interest with respect to the authorship and/or publication of this article.

Funding
The authors received no financial support for the research and/or authorship of this article.