BROCK PROCEDURE FOR THE RELIEF OF PULMONARY STENOSIS IN THE TETRALOGY OF FALLOT

PEDIATRICS ◽  
1951 ◽  
Vol 7 (2) ◽  
pp. 230-239
Author(s):  
DANIEL F. DOWNING ◽  
CHARLES P. BAILEY ◽  
ROBERT P. GLOVER
Keyword(s):  
Right Ventricle ◽  
Right Ventricular ◽  
Tetralogy Of Fallot ◽  
Exercise Tolerance ◽  
Pulmonary Valve ◽  
Pulmonary Stenosis ◽  
Outflow Tract ◽  
Direct Approach ◽  
The Right

The surgical relief of pulmonary stenosis has been both direct and indirect. The indirect procedures have inherent dangers; the direct approach of Brock appears to be without these dangers and the circulation is allowed a more normal course. This approach entails an incision into the right ventricular chamber and the cutting of the stenosed pulmonary valve or the removal of obstructing tissue in the outflow tract of the right ventricle. Cyanosis is usually relieved immediately. The patient's exercise tolerance is significantly increased. Eight cases are presented.

scholarly journals Individualized Surgical Reconstruction of the Right Ventricle Outflow Tract in Double Outlet Right Ventricle With Mirror Image-Dextrocardia

2021 ◽  
Vol 9 ◽  
Author(s):  
Wangping Chen ◽  
Chukwuemeka Daniel Iroegbu ◽  
Xia Xie ◽  
Wenwu Zhou ◽  
Ming Wu ◽  
...  
Keyword(s):  
Right Ventricle ◽  
Right Ventricular ◽  
Pulmonary Stenosis ◽  
Right Ventricular Outflow Tract ◽  
Ventricular Outflow Tract ◽  
Double Outlet Right Ventricle ◽  
Mirror Image ◽  
Outflow Tract ◽  
Surgical Reconstruction ◽  
The Right

Introduction: The purpose of this study was to report our experience in the surgical reconstruction of the right ventricular outflow tract in double outlet right ventricle with a major coronary artery crossing the right ventricular outflow tract in the presence of mirror image-dextrocardia.Methods: From January 2005 to December 2019, 19 double outlet right ventricle patients (median age 4 years) with mirror image-dextrocardia and a major coronary artery crossing the right ventricular outflow tract received surgical repair. An autologous pericardial patch was used to enlarge the right ventricular outflow tract in four patients without pulmonary stenosis and three patients with mild pulmonary stenosis. A valved bovine jugular venous conduit was added to a hypoplastic native pathway in nine patients, among which six patients with moderate pulmonary stenosis received small-sized bovine jugular venous conduit implantation (diameter ≤ 16 mm). In comparison, a large-sized bovine jugular venous conduit (diameter >16 mm) was adopted in a total of three patients with severe pulmonary stenosis. Finally, three patients with preoperative pulmonary hypertension (mean pulmonary artery pressure ≥40 mmHg) did not undergo further intervention of right ventricular outflow tract due to the adequate outflow tract blood flow.Results: There was no hospital mortality. One patient with sub-pulmonary ventricular septal defect and concomitant severe pulmonary hypertension died from respiratory failure 11 months after the operation. Kaplan-Meier survival was 94% at 5, 10 years. Within a mean echocardiographic follow-up of 6.9 ± 3.6 years, a total of two patients received reintervention due to valvular stenosis of the bovine jugular venous conduit (pressure gradient > 50 mmHg at 4 and 9 years) after surgical operation. Actuarial freedom from reoperation was 90 and 72% at 5 and 10 years, respectively. During the last echocardiographic follow-up phase, all the survivors were in NYHA class I.Conclusions: Double outlet right ventricle with mirror image-dextrocardia is a rare and complicated congenital cardiac malformation. Surgical reconstruction of the right ventricular outflow tract should be individualized based on the degree of pulmonary stenosis and the specific anatomical features of each patient. Reconstructing the pulmonary artery using the various sizes of valved bovine jugular venous conduit is a safe and effective surgical method.

The current strategy of repair of tetralogy of Fallot in children and adults

2008 ◽  
Vol 18 (6) ◽  
pp. 608-614 ◽  
Author(s):  
Guo-Wei He ◽  
Xiao-Cheng Liu ◽  
Xiang-Rong Kong ◽  
Li-Xin Liu ◽  
Ying-Qun Yan ◽  
...  
Keyword(s):  
Right Ventricular ◽  
Tetralogy Of Fallot ◽  
Right Ventricular Function ◽  
Right Atrium ◽  
Pulmonary Valve ◽  
Right Ventricular Outflow Tract ◽  
Ventricular Outflow Tract ◽  
Outflow Tract ◽  
Pulmonary Insufficiency ◽  
The Right

AbstractObjectivesThe strategies of repair of tetralogy of Fallot change with the age of patients. In children older than 4 years and adults, the optimal strategy may be to use different method of reconstruction of the right ventricular outflow tract from those followed in younger children, so as to avoid, or reduce, the pulmonary insufficiency that is increasingly known to compromise right ventricular function.MethodsFrom April, 2001, through May, 2008, we undertook complete repair in 312 patients, 180 male and 132 female, with a mean age of 11.3 years ±0.4 years, and a range from 4 to 48 years, with typical clinical and morphological features of tetralogy of Fallot, including 42 patients with the ventriculo-arterial connection of double outlet right ventricle. The operation was performed under moderate hypothermia using blood cardioplegia. The ventricular septal defect was closed with a Dacron patch. When it was considered necessary to resect the musculature within the right ventricular outflow tract, or perform pulmonary valvotomy, we sought to preserve the function of the pulmonary valve by protecting as far as possible the native leaflets, or creating a folded monocusp of autologous pericardium.ResultsThe repair was achieved completely through right atrium in 192, through the right ventricular outflow tract in 83, and through the right atrium, the outflow tract, and the pulmonary trunk in 36 patients. A transjunctional patch was inserted in 169 patients, non-valved in all but 9. There were no differences regarding the periods of aortic cross-clamping or cardiopulmonary bypass. Of the patients, 5 died (1.6%), with no influence noted for the transjunctional patch. Of those having a non-valved patch inserted, three-tenths had pulmonary regurgitation of various degree, while those having a valved patch had minimal pulmonary insufficiency and good right ventricular function postoperatively, this being maintained after follow-up of 8 to 24-months.ConclusionsBased on our experience, we suggest that the current strategy of repair of tetralogy of Fallot in older children and adults should be based on minimizing the insertion of transjunctional patches, this being indicated only in those with very small ventriculo-pulmonary junctions. If such a patch is necessary, then steps should be taken to preserve the function of the pulmonary valve.

Late replacement of the pulmonary valve: when and what type of valve?

2005 ◽  
Vol 15 (S1) ◽  
pp. 58-63 ◽  
Author(s):  
James A. Quintessenza ◽  
Jeffrey P. Jacobs ◽  
Paul J. Chai ◽  
Victor O. Morell ◽  
Jorge M. Giroud ◽  
...  
Keyword(s):  
Right Ventricular ◽  
Tetralogy Of Fallot ◽  
Pulmonary Valve ◽  
Right Ventricular Outflow Tract ◽  
Ventricular Outflow Tract ◽  
Outflow Tract ◽  
Pulmonary Insufficiency ◽  
Operative Strategy ◽  
Surgical Options ◽  
The Right

After repair of tetralogy of Fallot, many patients present in need of reoperative surgical reconstruction of the right ventricular outflow tract. The predominant physiologic lesion is pulmonary insufficiency, but there may also be varying degrees of obstruction of the right ventricular outflow tract. In the past, it has been felt that patients tolerate pulmonary insufficiency reasonably well. In some patients, however, the long-term effects of pulmonary insufficiency and subsequent right ventricular dilation and dysfunction are associated with poor exercise tolerance and increased incidence of arrhythmias and sudden death.1,2 Numerous studies support replacement of the pulmonary valve as treatment for pulmonary insufficiency in order to improve performance, optimize hemodynamics, and better control arrhythmias.3–10 The indications for reconstruction of the right ventricular outflow tract in this setting, nonetheless, as well as the operative strategy, continue to evolve. There are multiple surgical options for replacement of the pulmonary valve for these patients, including aortic and pulmonary homografts, stented and stentless porcine valves, porcine valved conduits, bovine jugular venous conduits, and even mechanical valves and mechanical valved conduits.11–32 It was a less than ideal experience with these currently available options that stimulated our interest into employing alternative materials and techniques. Favorable experimental and clinical experience with valves made of a polytetrafluoroethylene monoleaflet33–36 encouraged us to consider a new method of reconstruction with this material, using a bifoliate polytetrafluoroethylene valve. In this work, we review our indications for replacement of the pulmonary valve after repair of tetralogy of Fallot, the surgical options available, and our experience reconstructing the right ventricular outflow tract with a new surgically created bifoliate polytetrafluoroethylene valve.

Right ventricular outflow tract obstruction (RVOTO)

2011 ◽  
Keyword(s):  
Pulmonary Artery ◽  
Right Ventricle ◽  
Right Ventricular ◽  
Tetralogy Of Fallot ◽  
Pulmonary Stenosis ◽  
Right Ventricular Outflow Tract ◽  
Ventricular Outflow Tract ◽  
Outflow Tract ◽  
Pulmonary Artery Stenosis ◽  
Pulmonary Valvar Stenosis

Introduction 82Pulmonary valvar stenosis 82Supravalvar pulmonary stenosis 84Pulmonary artery stenosis 84Double-chambered right ventricle 84RVOTO can be due to abnormalities at the following levels: • Mid RV.• Infundibulum (as in tetralogy of Fallot).• PV.• Supravalvular region.• Branch ± peripheral PAs....

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