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Gaetano Minzioni

Publications and source records attributed to Gaetano Minzioni.

8 recordsLinked to original sources
PubMed2006

Percutaneous mitral annuloplasty: an anatomic study of human coronary sinus and its relation with mitral valve annulus and coronary arteries.

BACKGROUND: To allow performance of "stand-alone" mitral annuloplasty with minimal invasiveness, percutaneous techniques consisting of delivery into the coronary sinus (CS) of devices intended to shrink the mitral valve annulus have recently been tested in animal models. These techniques exploit the anatomic proximity of the CS and mitral valve annulus in ovine or dogs. Knowledge of a detailed anatomic relationship between the CS, coronary arteries, and mitral valve annulus in humans is essential to define the safety and efficacy of percutaneous techniques in clinical practice. We sought to determine the qualitative and quantitative anatomic relationships between CS and surrounding structures in human hearts. METHODS AND RESULTS: The distance from the CS to the mitral valve annulus and the relationship between the CS and surrounding structures were studied in 61 excised cadaveric human hearts. Maximal distance from the CS to the mitral valve annulus was found to be up to 19 mm (mean, 9.7+/-3.2 mm). A diagonal or ramus branch, main circumflex artery, or its branches were located between anterior interventricular vein/CS and the mitral valve annulus in 16.4% and 63.9% of cases, respectively. CONCLUSIONS: Surgical anatomy suggests that in humans the CS is located behind the left atrial wall at a significant distance from the mitral valve annulus. Percutaneous mitral annuloplasty devices probably shrink the mitral valve annulus only by an indirect traction mediated by the left atrial wall; a theoretical risk of compressing coronary artery branches exists. Chronic studies are needed to address this problem and to determine long-term efficacy of such methods.

Cadaver↗
PubMed2005

A technique to reposition sinotubular junction in aortic valve reimplantation procedures with the De Paulis Valsalva graft.

Sinotubular junction reconstruction in reimplantation type of valve-sparing aortic procedure can present some problem when a Valsalva graft is used. Since in the Valsalva graft the sinotubular junction height is predetermined, correct matching with native commissures height can be difficult. We propose a method by which it is possible to create a new sinotubular junction in Valsalva graft without altering its original configuration.

Aortic Aneurysm↗
PubMed2005

The ideal theoretical graft oversizing in valve-sparing aortic operations with a standard tubular or a Valsalva graft.

OBJECTIVE: We sought to determine, by a mathematical model, the ideal theoretical degree of ascending aortic graft oversizing needed to obtain normal sinuses dimension in the reimplantation type of valve-sparing aortic operations. METHODS: To define a normal-range value, size of sinuses of Valsalva was conventionally expressed as the area surrounding fully opened aortic cusps, the so-called beyond leaflets area (BLA), and measured in 50 healthy subjects. A mathematical relationship between aortic annulus diameter, aortic sinuses diameter and resulting BLA was defined. By simulating intra-operative scenarios, the effect of different degrees of a standard or Valsalva graft oversizing on BLA extension was tested. RESULTS: The same degree of graft oversizing resulted in a bigger beyond leaflets area for the Valsalva graft than for a standard graft. Oversizing degrees exceeding +7mm for a standard graft and +3mm for the Valsalva graft resulted in a beyond leaflets area over normal limits. Results were expressed in a visual form as two different normograms, one for the standard graft and one for the Valsalva graft. CONCLUSIONS: A less pronounced graft oversizing is needed to achieve normal-range sinuses size when using a Valsalva graft, the ideal theoretical graft oversizing was +7mm for a standard graft and +3mm for the Valsalva graft, our normograms can be helpful in selecting a proper graft size when performing a valve-sparing aortic procedure.

Adult↗
PubMed2004

The triple-orifice repair: a new technique for the treatment of mitral regurgitation in severe Barlow's disease.

We report a case of severe Barlow's disease with a very complex pathology, in which we applied the "edge-to-edge" technique, creating a triple-orifice mitral valve. Different techniques should be used to correct a similar valve defect; the combination of different surgical procedures and the valve pathology may influence the post-repair recurrence of regurgitation. We believe that it is better to perform a simple and reproducible repair than to carry on with combined complex procedures that could increase the risk of a suboptimal outcome.

Adult↗
PubMed2000

Port Access Cardiac Surgery.

The port-access technique for cardiac surgery was recently developed at Stanford University in California as a less invasive method to perform some cardiac operations. The port-access system has been described in detail elsewhere. It is based on femoral arterial and venous access for cardiopulmonary bypass (CPB) and on the adoption of a specially designed triple-lumen catheter described originally by Peters, and subsequently modified and developed in the definitive configuration called the endoaortic clamp.

Journal Article↗