Case of reconstruction of the outflow tract of the right ventricle by implanting the second conduit after Rastelli operation

2017 ◽  
Vol 18 (5) ◽  
pp. 519-523
Author(s):  
V.P. Podzolkov ◽  
V.B. Samsonov ◽  
V.N. Cheban ◽  
A.V. Minaev
Keyword(s):  
Right Ventricle ◽  
Outflow Tract ◽  
The Right ◽  
Rastelli Operation

scholarly journals Dynamic anatomical study of cardiac shunting in crocodiles using high-resolution angioscopy

1996 ◽  
Vol 199 (2) ◽  
pp. 359-365 ◽  
Author(s):  
M Axelsson ◽  
C E Franklin ◽  
C O Löfman ◽  
S Nilsson ◽  
G C Grigg
Keyword(s):  
High Resolution ◽  
Connective Tissue ◽  
Right Ventricle ◽  
Anatomical Study ◽  
Systemic Circulation ◽  
Outflow Tract ◽  
Aortic Valves ◽  
Aortic Blood Pressure ◽  
The Right

Prolonged submergence imposes special demands on the cardiovascular system. Unlike the situation in diving birds and mammals, crocodilians have the ability to shunt blood away from the lungs, despite having an anatomically divided ventricle. This remarkable cardiovascular flexibility is due in part to three anatomical peculiarities: (1) an 'extra' aorta (the left aorta) that leaves the right ventricle and allows the blood from the right ventricle to take an alternative route into the systemic circulation instead of going to the lungs; (2) the foramen of Panizza, an aperture that connects the right and left aortas at their base immediately outside the ventricle; and (3) a set of connective tissue outpushings in the pulmonary outflow tract in the right ventricle. Using high-resolution angioscopy, we have studied these structures in the beating crocodile heart and correlated their movements with in vivo pressure and flow recordings. The connective tissue outpushings in the pulmonary outflow tract represent an active mechanism used to restrict blood flow into the lungs, thus creating one of the conditions required for a right-to-left shunt. We observed that the foramen of Panizza was obstructed by the medial cusp of the right aortic valve during most of systole, effectively differentiating the left and right aortic blood pressure. During diastole, however, the foramen remained open, allowing pressure equilibration between the two aortas. Contrary to current theories, we found that the left aortic valves were unable to cover the foramen of Panizza during any part of the cardiac cycle, supporting the reversed foramen flow hypothesis. This would ensure a supply of blood to the coronary and cephalic circulation during a complete shut-down of the left side of the heart, such as might occur during prolonged submergence.

Pressure segment length analysis of right ventricular function: influence of loading conditions

1991 ◽  
Vol 260 (4) ◽  
pp. H1087-H1097
Author(s):  
J. E. Calvin
Keyword(s):  
Right Ventricle ◽  
Right Ventricular ◽  
Ventricular Function ◽  
Systolic Pressure ◽  
Pressure Overload ◽  
Outflow Tract ◽  
Segment Length ◽  
Stroke Work ◽  
Volume Changes ◽  
The Right

The purpose of this study was to determine whether segment lengths measured from the right ventricular inflow and outflow tract regions of the right ventricle would accurately reflect true volume changes of the right ventricle and to determine the response of the right ventricle to afterload increases induced by both constricting the pulmonary artery (PAC) and embolizing the pulmonary circulation with glass beads (GBE). Three excised hearts were instrumented with segment-length crystals attached to the inflow and outflow tract regions, and saline was instilled into a balloon implanted inside the right ventricular cavity. The experiments showed a high correlation (r greater than or equal to 0.90 in all cases) between static segment lengths and volume instilled. In open chest, open pericardial canine experiments, vena caval occlusion reduced end-diastolic segments lengths and right ventricular systolic pressure consistent with a reduction in right ventricular end-diastolic volume. In a separate group of animals, volume loading with dextran increased inflow and outflow end-diastolic segment lengths and increased cardiac output. In two further groups of animals, one of which was pretreated intravenously with propranolol (Inderal), both forms of pressure overload increased end-diastolic lengths in both regions. However, GBE increased right ventricular stroke work compared with PAC. We conclude that end-diastolic segment lengths reflect true volume changes of the right ventricle. Furthermore, during acute pressure overload, the right ventricle dilates to compensate for the afterload change. However, ventricular function is better maintained after GBE.

scholarly journals Hemodynamic Changes in the Right Ventricle Induced by Variations of Cardiac Output: A Possible Mechanism for Arrhythmia Occurrence in the Outflow Tract

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Utku Gülan ◽  
Ardan Muammer Saguner ◽  
Deniz Akdis ◽  
Alexander Gotschy ◽  
Felix C. Tanner ◽  
...  
Keyword(s):  
Cardiac Output ◽  
Right Ventricle ◽  
Outflow Tract ◽  
Hemodynamic Changes ◽  
The Right

scholarly journals Novel CineECG Derived From Standard 12-Lead ECG Enables Right Ventricle Outflow Tract Localization of Electrical Substrate in Patients With Brugada Syndrome

2020 ◽  
Vol 13 (9) ◽  
Author(s):  
Peter M. van Dam ◽  
Emanuela T. Locati ◽  
Giuseppe Ciconte ◽  
Valeria Borrelli ◽  
Francesca Heilbron ◽  
...  
Keyword(s):  
Right Ventricle ◽  
Brugada Syndrome ◽  
Predictive Value ◽  
Normal Subjects ◽  
Outflow Tract ◽  
Arrhythmogenic Substrate ◽  
The Right ◽  
Type 3 ◽  
Electrocardiogram Ecg

Background: In Brugada syndrome (BrS), diagnosed in presence of a spontaneous or ajmaline-induced type-1 pattern, ventricular arrhythmias originate from the right ventricle outflow tract (RVOT). We developed a novel CineECG method, obtained by inverse electrocardiogram (ECG) from standard 12-lead ECG, to localize the electrical activity pathway in patients with BrS. Methods: The CineECG enabled the temporospatial localization of the ECG waveforms, deriving the mean temporospatial isochrone from standard 12-lead ECG. The study sample included (1) 15 patients with spontaneous type-1 Brugada pattern, and (2) 18 patients with ajmaline-induced BrS (at baseline and after ajmaline), in whom epicardial potential duration maps were available; (3) 17 type-3 BrS pattern patients not showing type-1 BrS pattern after ajmaline (ajmaline-negative); (4) 47 normal subjects; (5) 18 patients with right bundle branch block (RBBB). According to CineECG algorithm, each ECG was classified as Normal, Brugada, RBBB, or Undetermined. Results: In patients with spontaneous or ajmaline-induced BrS, CineECG localized the terminal mean temporospatial isochrone forces in the RVOT, congruent with the arrhythmogenic substrate location detected by epicardial potential duration maps. The RVOT location was never observed in normal, RBBB, or ajmaline-negative patients. In most patients with ajmaline-induced BrS (78%), the RVOT location was already evident at baseline. The CineECG classified all normal subjects and ajmaline-negative patients at baseline as Normal or Undetermined, all patients with RBBB as RBBB, whereas all patients with spontaneous and ajmaline-induced BrS as Brugada. Compared with standard 12-lead ECG, CineECG at baseline had a 100% positive predictive value and 81% negative predictive value in predicting ajmaline test results. Conclusions: In patients with spontaneous and ajmaline-induced BrS, the CineECG localized the late QRS activity in the RVOT, a phenomenon never observed in normal, RBBB, or ajmaline-negative patients. The possibility to identify the RVOT as the location of the arrhythmogenic substrate by the noninvasive CineECG, based on the standard 12-lead ECG, opens new prospective for diagnosing patients with BrS.

Initial Experience in Chile with Stent Implantation in the Right Ventricle Outflow Tract in High-Risk Patients with Tetralogy of Fallot

2020 ◽  
Vol 41 (4) ◽  
pp. 837-842
Author(s):  
Paulo Valderrama ◽  
Francisco Garay ◽  
Daniel Springmüller ◽  
Yeny Briones ◽  
Daniel Aguirre ◽  
...  
Keyword(s):  
High Risk ◽  
Right Ventricle ◽  
Tetralogy Of Fallot ◽  
Stent Implantation ◽  
Outflow Tract ◽  
Initial Experience ◽  
High Risk Patients ◽  
Risk Patients ◽  
The Right

Non-surgical reconstruction of the right ventricular outflow tract in acquired infundibular atresia

1995 ◽  
Vol 5 (1) ◽  
pp. 78-81
Author(s):  
Eric Rosenthal ◽  
Shakeel A. Qureshi ◽  
Michael Tynan
Keyword(s):  
Right Ventricle ◽  
Right Ventricular Outflow Tract ◽  
Ventricular Outflow Tract ◽  
Outflow Tract ◽  
Pulmonary Trunk ◽  
Surgical Reconstruction ◽  
Laser Perforation ◽  
Pulmonary Arterial ◽  
Antegrade Flow ◽  
The Right

SummaryA 33-year-old woman known to have tetralogy of Fallot and a straddling tricuspid valve had bilateral systemic-to-pulmonary arterial shunts constructed at the age of six months. She subsequently developed infundibular atresia. Antegrade flow of blood from the right ventricle to pulmonary trunk was re-established by percutaneous laser perforation of the outflow tract, later followed by implantation of a stent.

Sign in / Sign up

Export Citation Format

Share Document