Surgical Management of a Giant Left Ventricular Fibroma in a Newborn.

This clinical case report describes surgical management of a giant left ventricular fibroma and postoperative venoarterial extracorporeal membrane oxygenation support in a newborn male. Transthoracic echocardiography performed at 9-month follow-up showed an ejection fraction of 33% and a cardiac index of 4.5 liters per minute per square meter.

Surgery for aortic recoarctation in children less than 10 years old: A single-center experience in Siberia, Russia.

BACKGROUND: Persistence or recurrence of stenosis is a complication of initial coarctation repair. This study aims to report short-term outcomes of surgical management of recurrent coarctation and initial repair analysis. METHODS: We retrospectively reviewed our experience with 51 patients undergoing recoarctation surgical repair between 2008 and 2019 using antegrade cerebral perfusion (ACP) technique. RESULTS: Surgical correction included prosthetic patch aortoplasty in 23 (45%), resection with wide end-to-end anastomosis in 15 (29%), and a tube interposition graft in 13 (25%) patients. The median age at initial correction and reintervention was 12 months and 9 years. The median interval from primary repair to reintervention was 60 months. Initial repair analysis revealed 33% of patients had initial correction in the neonatal period, 72.5% of patients were done via a left thoracotomy approach and 63% of patients had end-to-end anastomosis at initial surgery. CONCLUSION: Our study demonstrates that surgical repair of recurrent coarctation of the aorta using ACP technique can be performed safely and with excellent results.

Enhancing Lithium and Sodium Storage Properties of TiO2(B) Nanobelts by Doping with Nickel and Zinc.

Nickel- and zinc-doped TiO2(B) nanobelts were synthesized using a hydrothermal technique. It was found that the incorporation of 5 at.% Ni into bronze TiO2 expanded the unit cell by 4%. Furthermore, Ni dopant induced the 3d energy levels within TiO2(B) band structure and oxygen defects, narrowing the band gap from 3.28 eV (undoped) to 2.70 eV. Oppositely, Zn entered restrictedly into TiO2(B), but nonetheless, improves its electronic properties (Eg is narrowed to 3.21 eV). The conductivity of nickel- (2.24 × 10-8 S·cm-1) and zinc-containing (3.29 × 10-9 S·cm-1) TiO2(B) exceeds that of unmodified TiO2(B) (1.05 × 10-10 S·cm-1). When tested for electrochemical storage, nickel-doped mesoporous TiO2(B) nanobelts exhibited improved electrochemical performance. For lithium batteries, a reversible capacity of 173 mAh·g-1 was reached after 100 cycles at the current load of 50 mA·g-1, whereas, for unmodified and Zn-doped samples, around 140 and 151 mAh·g-1 was obtained. Moreover, Ni doping enhanced the rate capability of TiO2(B) nanobelts (104 mAh·g-1 at a current density of 1.8 A·g-1). In terms of sodium storage, nickel-doped TiO2(B) nanobelts exhibited improved cycling with a stabilized reversible capacity of 97 mAh·g-1 over 50 cycles at the current load of 35 mA·g-1.

Surgical management of a giant congenital left ventricular aneurysm in a 2-month-old infant.

A congenital left ventricular aneurysm is very rare. Clinical presentation varies from absence of symptoms to ventricular arrhythmias, heart failure or even sudden death. The optimal management is controversial and the surgical technique is not defined. A left ventricular aneurysm was diagnosed on prenatal echocardiography at 33 weeks gestation. After birth, initial transthoracic echocardiography confirmed the diagnosis. Two months later, the infant was taken to surgery for aneurysm repair using the Dor procedure with cardiopulmonary bypass. This technique eliminates the need for external prosthetic materials and produces a more physiologic left ventricular geometry. Transthoracic echocardiography performed at 6-month follow-up showed an ejection fraction of 66%.

Modified Cone Reconstruction of the Tricuspid Valve for Ebstein Anomaly as Performed in Siberia.

The cone reconstruction technique, first described by da Silva and modified by Dearani and by others, has become the repair method of choice in patients with Ebstein anomaly of the tricuspid valve. This report details the outcome of the modified cone reconstruction technique in 6 children who underwent surgical correction of Ebstein anomaly at the Tomsk Institute of Cardiology in Siberia. From 2012 through 2015, 4 boys and 2 girls (age range, 11 mo-12 yr) underwent surgery to correct Ebstein anomaly. All had presented with cyanosis, exertional dyspnea, fatigue, or new-onset atrial arrhythmia, and none had undergone previous cardiac surgery. All survived the operation. One patient needed tricuspid valve replacement with a bioprosthesis after early breakdown of the cone reconstruction. As of December 2016, all the patients had no symptoms, tricuspid stenosis, or arrhythmia. This series indicates that cone reconstruction-the most anatomic repair technique for the dysmorphic Ebstein tricuspid valve-can be successfully performed in pediatric heart centers with a large experience.