Surgical Repair of Anomalous Origin of the Left Subclavian Artery From the Pulmonary Artery Using a Supraclavicular Approach.

Anomalous origin of the left subclavian artery from the pulmonary artery is a rare congenital cardiac malformation. We describe a case of anomalous origin of the left subclavian artery from the pulmonary artery in a patient who presented with symptoms of vertebrobasilar insufficiency and underwent reimplantation of the left subclavian artery into the left common carotid artery from the supraclavicular approach.

Single-stage off-pump repair of coarctation of the aorta and ventricular septal defects in children.

OBJECTIVES: The appropriate approach for surgical repair of coarctation of the aorta with a ventricular septal defect (VSD) remains controversial. This study evaluated the outcomes of primary repair of VSDs with periventricular device closure without cardiopulmonary bypass through a left thoracotomy in patients without arch hypoplasia. METHODS: We selected 21 patients aged <1 year, including 7 neonates, who underwent repair of coarctation of the aorta with periventricular device closure of a VSD. RESULTS: The median occluder size was 6 (range, 5-8) mm. The median mechanical ventilation time was 14 (range, 2-68) h, and the median duration of hospital stay was 11 (range, 7-16) days. No reoperations were required to correct VSD shunting, and the median residual shunt size was 1 (range, 1-2) mm. The median follow-up period was 13 (range, 4-31) months. No late deaths were reported, and no haemodynamically significant pressure gradient at the anastomotic site was observed. The median distal aortic arch z-score was 0.39 (range, -0.1-to 0.9). Only 1 patient had a permanent pacemaker implanted towards the end of the follow-up period. CONCLUSIONS: Periventricular device closure can be used safely for closure of VSD in children with coarctation of the aorta without a hypoplastic aortic arch, even in neonates, to reduce the risk of prolonged cardiopulmonary bypass. This hybrid approach can be performed with a low incidence of rhythm disturbances and residual shunting. However, a meticulous assessment of the VSD anatomy is essential to avoid any unfavourable events.

Effects of Electrospinning Parameter Adjustment on the Mechanical Behavior of Poly-ε-caprolactone Vascular Scaffolds.

Electrospinning is a perspective method widely suggested for use in bioengineering applications, but the variability in currently available data and equipment necessitates additional research to ascertain the desirable methodology. In this study, we aimed to describe the effects of electrospinning technique alterations on the structural and mechanical properties of (1,7)-polyoxepan-2-one (poly-ε-caprolactone, PCL) scaffolds, such as circumferential and longitudinal stress/strain curves, in comparison with corresponding properties of fresh rat aorta samples. Scaffolds manufactured under different electrospinning modes were analyzed and evaluated using scanning electronic microscopy as well as uniaxial longitudinal and circumferential tensile tests. Fiber diameter was shown to be the most crucial characteristic of the scaffold, correlating with its mechanical properties.

Residual Lesion Diagnostics in Pediatric Postcardiotomy Extracorporeal Membrane Oxygenation and Its Outcomes.

BACKGROUND: To assess the impact of diagnostic procedures in identifying residual lesions during extracorporeal membrane oxygenation (ECMO) on survival after pediatric cardiac surgery. METHODS: Between January 2012 and December 2017, 74 patients required postcardiotomy ECMO. Patients were retrospectively divided into 2 groups: Group I underwent only echocardiography ([echo only] 46 patients, 62.2%) and group II (echo+) underwent additional diagnostic tests (ie, computed tomography [CT] or cardiac catheterization; 28 patients, 37.8%). Propensity score matching was used to balance the 2 groups by baseline characteristics. RESULTS: Two equal groups (28 patients in each group) were formed by propensity score matching. Fourteen (50%) patients in the echo-only group and 20 (71%) patients in the echo+ group were successfully weaned from ECMO (P = .17). Four (14.3%) patients survived in the echo-only group and 15 (53.5%) patients survived in the echo+ group (P = .004). Patients in the echo+ group had a lower chance of dying compared to the echo-only group (odds ratio, 0.14.6; 95% CI, 0.039-0.52; P = .003). The residual lesions, which may have served as a mortality factor, were found by autopsy in 8 (40%) patients in the echo-only group, while none were found in the echo+ group (P = .014). CONCLUSIONS: The autopsies of patients who died despite postcardiotomy ECMO support showed that in 40% of cases that had been investigated by echo only, residual lesions that had not been detected by echocardiography were present. The cardiac catheterization and CT during ECMO are effective and safe for identifying residual lesions. Early detection and repair of residual lesions may increase the survival rate of pediatric cardiac patients on ECMO.

Effect of intraoperative dexamethasone on major complications and mortality among infants undergoing cardiac surgery The DECISION Randomized Clinical Trial

IMPORTANCE Corticosteroids are widely used in pediatric cardiac surgery to blunt systemic inflammatory response and to reduce complications; nevertheless, their clinical efficacy is uncertain. OBJECTIVE To determine whether intraoperative administration of dexamethasone is more effective than placebo for reducing major complications and mortality during pediatric cardiac surgery. DESIGN, SETTING, AND PARTICIPANTS The Intraoperative Dexamethasone in Pediatric Cardiac Surgery was an investigator-initiated, double-blind, multicenter randomized trial that involved 4 centers in China, Brazil, and Russia. A total of 394 infants younger than 12 months, undergoing cardiac surgery with cardiopulmonary bypass were enrolled from December 2015 to October 2018, with follow-up completed in November 2018. INTERVENTIONS The dexamethasone group (n = 194) received 1mg/kg of dexamethasone; the control group (n = 200) received an equivolume of 0.9%sodium chloride intravenously after anesthesia induction. MAIN OUTCOMES AND MEASURES The primary end pointwas a composite of death, nonfatalmyocardial infarction, need for extracorporeal membrane oxygenation, need for cardiopulmonary resuscitation, acute kidney injury, prolonged mechanical ventilation, or neurological complications within 30 days after surgery. There were 17 secondary end points, including the individual components of the primary end point, and duration of mechanical ventilation, inotropic index, intensive care unit stay, readmission to intensive care unit, and length of hospitalization. RESULTS All of the 394 patients randomized (median age, 6 months; 47.2%boys) completed the trial. The primary end point occurred in 74 patients (38.1%) in the dexamethasone group vs 91 patients (45.5%) in the control group (absolute risk reduction, 7.4%; 95%CI, −0.8%to 15.3%; hazard ratio, 0.82; 95%CI, 0.60 to 1.10; P = .20). Of the 17 prespecified secondary end points, none showed a statistically significant difference between groups. Infections occurred in 4 patients (2.0%) in the dexamethasone group vs 3 patients (1.5%) in the control group. CONCLUSIONS AND RELEVANCE Among infants younger than 12 months undergoing cardiac surgery with cardiopulmonary bypass, intraoperative administration of dexamethasone, compared with placebo, did not significantly reduce major complications and mortality at 30 days. However, the study may have been underpowered to detect a clinically important difference.

Effect of Intraoperative Dexamethasone on Major Complications and Mortality Among Infants Undergoing Cardiac Surgery: The DECISION Randomized Clinical Trial.

Importance: Corticosteroids are widely used in pediatric cardiac surgery to blunt systemic inflammatory response and to reduce complications; nevertheless, their clinical efficacy is uncertain. Objective: To determine whether intraoperative administration of dexamethasone is more effective than placebo for reducing major complications and mortality during pediatric cardiac surgery. Design, Setting, and Participants: The Intraoperative Dexamethasone in Pediatric Cardiac Surgery was an investigator-initiated, double-blind, multicenter randomized trial that involved 4 centers in China, Brazil, and Russia. A total of 394 infants younger than 12 months, undergoing cardiac surgery with cardiopulmonary bypass were enrolled from December 2015 to October 2018, with follow-up completed in November 2018. Interventions: The dexamethasone group (n = 194) received 1 mg/kg of dexamethasone; the control group (n = 200) received an equivolume of 0.9% sodium chloride intravenously after anesthesia induction. Main Outcomes and Measures: The primary end point was a composite of death, nonfatal myocardial infarction, need for extracorporeal membrane oxygenation, need for cardiopulmonary resuscitation, acute kidney injury, prolonged mechanical ventilation, or neurological complications within 30 days after surgery. There were 17 secondary end points, including the individual components of the primary end point, and duration of mechanical ventilation, inotropic index, intensive care unit stay, readmission to intensive care unit, and length of hospitalization. Results: All of the 394 patients randomized (median age, 6 months; 47.2% boys) completed the trial. The primary end point occurred in 74 patients (38.1%) in the dexamethasone group vs 91 patients (45.5%) in the control group (absolute risk reduction, 7.4%; 95% CI, -0.8% to 15.3%; hazard ratio, 0.82; 95% CI, 0.60 to 1.10; P = .20). Of the 17 prespecified secondary end points, none showed a statistically significant difference between groups. Infections occurred in 4 patients (2.0%) in the dexamethasone group vs 3 patients (1.5%) in the control group. Conclusions and Relevance: Among infants younger than 12 months undergoing cardiac surgery with cardiopulmonary bypass, intraoperative administration of dexamethasone, compared with placebo, did not significantly reduce major complications and mortality at 30 days. However, the study may have been underpowered to detect a clinically important difference. Trial Registration: ClinicalTrials.gov Identifier: NCT02615262.

Selective Antegrade Cerebral Perfusion With or Without Additional Lower Body Perfusion During Aortic Arch Reconstruction in Infants.

BACKGROUND: Aortic arch reconstruction is often challenging, especially in infants, owing to its high postoperative complication risks. This study aimed to compare the effectiveness between selective antegrade cerebral perfusion (SACP) alone and SACP in combination with continuous lower body perfusion with descending aortic cannulation (DAC) in preserving renal function, and to determine the influence of perfusion strategy on the postoperative course of infants who underwent aortic arch reconstruction. MATERIAL AND METHODS: A total of 121 infants who underwent aortic arch reconstruction between January 2008 and December 2018 were included in the analysis. Patients (median age: 29 days, range: 3-270 days) were divided into the following groups: those who underwent repair with SACP (SACP group, 79 patients) and those who underwent additional lower body perfusion (DAC group, 42 patients). RESULTS: Three (7.1%) and nine (11.4%) patients died in the DAC and SACP groups, respectively (P = .54). The SACP group had more patients requiring renal replacement therapy (P = .002) and higher incidence of second stage acute kidney injury (AKI) development (Kidney disease improving global outcomes (KDIGO) criteria; P = .032). The SACP group had higher frequency of open chest postoperatively than the DAC group (P = .011). The DAC group had lower vasoactive inotropic score (VIS) at the first postoperative day (P < .001) and shorter intensive care unit length of stay (P = .050). There was no difference in neurological complications between the groups (P = .061). High VIS was associated with early mortality (odds ratio [OR]: 1.79 [1.33-2.41], P < .001) and AKI (OR: 1.60 [1.35-1.91], P < .001). The DAC perfusion strategy with minimal hypothermia was associated with lower risk of AKI (OR: 0.91 [0.84-0.98], P = .016). CONCLUSION: Antegrade cerebral perfusion with continuous lower body perfusion via DAC could effectively be used for improving early postoperative results among infants undergoing procedures that include aortic arch reconstruction.

Vacuum-assisted closure versus closed irrigation for deep sternal wound infection treatment in infants: a propensity score-matched study.

OBJECTIVES: This study aimed to compare vacuum-assisted closure therapy (VAC) and closed irrigation drainage therapy (CID) for deep sternal wound infection treatment in infants. METHODS: From January 2008 to March 2018, 69 patients (1.73%) had deep sternal wound infection. They were divided into 2 groups: patients treated with VAC therapy (VAC group, 29 patients) and those treated with CID therapy (CID group, 40 patients). After performing a propensity score analysis (1:1) for the entire sample, 16 patients receiving VAC therapy were matched with 16 patients receiving CID therapy. RESULTS: No significant difference was noted between both groups regarding age [d = 0.045; 95% confidence interval (CI) 0.99-1.07], gender (d = 0.001; 95% CI 0.22-4.45), weight (d = 0.011; 95% CI 0.73-1.35), body surface area (d = -0.023; 95% CI 0.01-5733.08), cardiopulmonary bypass (d = 0; 95% CI 0.16-5.90) and open chest duration (d = -0.112; 95% CI 0.31-5.16). Five patients died in the CID group (31.25%) during hospital stay, and there were no deaths in the VAC group (P = 0.024). Recurrence of mediastinitis occurred in 1 patient (6.25%) from the VAC group and in 6 patients (37.5%) from the CID group (P = 0.037). The multivariable regression analysis revealed that the CID method was the only risk factor for remediastinitis (odds ratio 17.3; 95% CI 1.04-286.75; P = 0.046). CONCLUSIONS: Use of VAC therapy in infants with deep sternal wound infection was associated with a substantial decrease in the mortality rate and duration of therapy compared with CID technique. The CID technique was an independent risk factor for recurrence of mediastinitis.

Double Arterial Cannulation in the Critical Management of Neonatal Aortic Arch Obstruction With Closed Ductus Arteriosus.

The neonatal management of critical aortic arch obstruction in association with an arterial duct that remains closed or significantly constricted requires urgent surgical repair, with a postoperative focus on resolving the impaired function of compromised organs. Here, we present two neonatal cases illustrating the use of the dual arterial cannulation perfusion method in the complete repair of interrupted aortic arch and critical coarctation of the aorta with nonfunctional ductus arteriosus. We suggest that dual arterial cannulation, which provides total body perfusion (with the exception of cardiac perfusion during cardioplegic arrest of the heart), may be a good alternative to other perfusion strategies in cases of absent ductal blood flow, as this method allowed us to avoid the further development of severe multiple organ failure.

Extracorporeal cardiopulmonary resuscitation after pulmonary artery rupture.

Pulmonary artery rupture during pulmonary balloon valvuloplasty is a rare and life-threatening complication. Here, we present a pulmonary artery rupture in a 10-month-old infant. The patient had a tamponade, ineffective cardiac massage for 40 minutes and extreme hemodilution due to blood loss. Extracorporeal life support was used for three days. The patient was discharged without any neurological sequelae.

Postcardiotomy refractory ventricular fibrillation: rescue using veno-arterial extracorporeal membrane oxygenation.

We present a case of 7-hour ventricular fibrillation with successful use of veno-arterial extracorporeal membrane oxygenation as a bridge to recovery in a 30-year-old patient with grown-up congenital heart disease who underwent pulmonary valve replacement.

Modified reverse aortoplasty versus extended anastomosis in patients with coarctation of the aorta and distal arch hypoplasia.

OBJECTIVES: The aim of our prospective randomized study was to compare modified reverse aortoplasty (MRA) and extended end-to-end anastomosis (EEA). METHODS: We have assessed the operative correction results in 54 infants with coarctation of the aorta and distal aortic arch hypoplasia who underwent primary repair in our institute between July 2013 and February 2014. All of the patients were <12 months old when they had the operation. Patients were randomly assigned to 2 arms: modified reverse subclavian flap angioplasty (MRA group; n = 27) or extended end-to-end anastomosis (EEA group; n = 27). RESULTS: We found a significant difference in residual arterial hypertension between the groups: 2 (7.7%) patients in the MRA group and 8 (30.8%) patients in the EEA group, respectively (P = 0.03). Risk factors for arterial hypertension were precoarctation area rigidity and endocardial fibroelastosis. During the last follow-up visit, recoarctation was observed in 1 (3.8%) patient in the MRA group and in 2 (7.7%) patients in the EEA group, respectively (P = 0.50). Cox regression analysis showed that the only risk factor for recoarctation was the patient's low weight before surgery [odds ratio (95% confidence interval) 0.016 (0.001-0.51), P = 0.047]. An aortic aneurysm developed in 2 (7.7%) patients in the MRA group; however, no significant difference was found between the groups (P = 0.15). CONCLUSIONS: The results of surgical repair of coarctation of the aorta using modified reverse subclavian flap angioplasty and extended anastomosis were comparable in mortality rates and early postoperative complications. Nevertheless, MRA may be beneficial in reducing residual arterial hypertension at the mid-term follow-up visit.

Does mitral valve repair matter in infants with ventricular septal defect combined with mitral regurgitation?

OBJECTIVES: This study aimed to assess mitral valve function after repair of ventricular septal defect (VSD) combined with mitral regurgitation (MR) in the mid-term follow-up period, to evaluate the clinical utility of simultaneous mitral valve repair (MVR). METHODS: From June 2005 to March 2014, 60 patients with VSD and MR underwent surgical treatment. After performing propensity score analysis (1:1) for the entire sample, 46 patients were selected and divided into 2 groups: those with VSD closure and MVR (VSD + MVR, 23 patients) and those with VSD closure without mitral valve intervention (VSD only, 23 patients). The follow-up period ranged from 12 to 48 months (median 32 months; interquartile range 28-40 months). RESULTS: There was no postoperative mortality in either group. There was no significant difference in the duration of the postoperative period between groups (ventilation time, P = 0.49; inotropic support, P = 0.50). Mean cardiopulmonary bypass time and aortic cross-clamping time were significantly longer in the 'VSD + MVR' group (cardiopulmonary bypass, P = 0.023; aortic cross-clamp, P < 0.001). There was no significant difference in regurgitation area (P = 0.30) and MR grade (P = 0.76) between groups postoperatively. There was no significant difference in freedom from MR ≥ 2+ between groups (log-rank test, P = 0.28). In the 'VSD + MVR' group, 12-, 36- and 42-month freedom from MR ≥ 2+ values were 100%, 59 ± 10.4% [95% confidence interval (CI) 36.1-76.2%] and 44 ± 15% (95% CI 15.8-69.7%), respectively, while in the 'VSD only' group, these values were 100%, 54.5 ± 10.6% (95% CI 32-72.3%) and 54.5 ± 10.6% (95% CI 30-72.3%), respectively. The only significant risk factor for recurrent MR ≥ 2+ during the follow-up period was mild residual MR in the early postoperative period (P = 0.037). CONCLUSIONS: In infants with VSD combined with MR, simultaneous MVR has no benefits simultaneous MVR provided no advantage over that of isolated VSD closure. We found that the presence of mild residual MR in the early postoperative period predisposes the development of MR ≥ 2+ in follow-up period.

Risk Factors For Unfavorable Outcomes After Bidirectional Cavopulmonary Anastomosis.

BACKGROUND: Bidirectional cavopulmonary anastomosis (BCPA) is an important preliminary step toward the Fontan procedure; thus, understanding of risk factors for morbidity and mortality after BCPA may ultimately promote improved rates of success with Fontan completion and general survival. This study evaluated survival and predictors of unfavorable outcomes in patients after BCPA. METHODS: Clinical data of 157 patients who underwent BCPA from 2003 to 2015 at a single center were retrospectively analyzed. RESULTS: Three-year and nine-year survival after BCPA were 87.1% ± 2.8% and 85.8% ± 2.9%, respectively. Freedom from unfavorable outcomes (mortality, BCPA takedown, nonsuitability for Fontan procedure) was 83.8% ± 3.1% at three years and 73.5% ± 4.8% at nine years. Multivariate proportional hazards regression analysis revealed that total anomalous pulmonary venous connection (TAPVC; hazard ratio [HR]: 3.74, 95% confidence interval [CI]: 1.35-10.36; P = .01) and increased mean pressure in BCPA circuit (HR: 1.17, 95% CI: 1.02-1.34; P = .03) were independent risk factors for unfavorable outcomes. Postoperative mean pressure in BCPA circuit in patients with poor outcomes was median 16 mm Hg (interquartile range [IQR]: 14-18 mm Hg) versus median 14 mm Hg (IQR: 12-15.5 mm Hg) in patients with favorable outcomes ( P < .01). Preoperative (HR: 1.87, 95% CI: 1.20-2.91; P < .01) and postoperative atrioventricular valve regurgitation (AVVR; HR: 2.22, 95% CI: 1.24-3.94; P < .01) were also associated with unfavorable outcome in univariate Cox regression. CONCLUSIONS: Elevated mean pressure in the BCPA circuit is the main predictor of unfavorable outcome; therefore, thorough preoperative examination and careful patient selection are critical points for successful intermediate-stage and later Fontan completion. Total anomalous pulmonary venous connection and insufficient correction of AVVR worsen the prognosis in this patient group.

Outcomes of perventricular off-pump versus conventional closure of ventricular septal defects: a prospective randomized study.

OBJECTIVES: Perventricular device closure (PVDC) of ventricular septal defects (VSDs) has demonstrated excellent clinical results. However, no prospective studies have compared PVDC with the conventional approach (CA). METHODS: Between June 2012 and August 2014, 640 consecutive patients with isolated VSD were enrolled in the study, and randomized into the PVDC group ( n = 320) and the CA group ( n = 320). The mean ages were 36.2 (10; 36) months and 36.2 (10; 36) months, respectively. The average weights were 13.9 (8.1; 15.0) kg and 14.5 (6.9; 13.8) kg, respectively. The mean follow-up was 24.9 (standard deviation 1.8) months. RESULTS: No early or late deaths occurred in either group. The procedural success rate reached 96.6% in the PVDC group, with a 3.4% conversion rate to CA. Mean procedure time was 56.9 (30; 70) min in the PVDC group and 162 (120; 180) min in the CA group ( P = 0.000). Thirteen (3.9%) patients in the CA group and only 4 (1.3%) in the PVDC group required postoperative blood transfusion in the intensive care unit ( P = 0.040). At the final follow-up, significantly more residual shunts were found in the CA group. No rhythm or conduction disorders occurred in any patient of either group. CONCLUSIONS: According to the mid-term follow-up results, PVDC has similar efficacy to CA for VSD closure. The off-pump PVDC technique reduces blood product transfusion and the procedural time and minimizes surgical trauma while providing excellent cosmetic results.

Bidirectional cavopulmonary anastomosis with additional pulmonary blood flow: good or bad pre-Fontan strategy.

Objectives: This study aimed to evaluate the influence of preserved additional pulmonary blood flow (APBF) on survival after bidirectional cavopulmonary shunt (BCPS) and completion of Fontan circulation. Methods: From March 2003 and April 2015, 156 patients with a single ventricle underwent BCPS. After performing propensity score analysis (1:1) for the entire sample, 50 patients with APBF (APBF group) were matched with 50 patients without APBF (no-APBF group). Results: Age ( P = 0.90), sex ( P = 0.57), weight ( P = 0.75), single ventricle morphology ( P = 0.87), type of neonatal palliative procedure ( P = 0.52), saturation ( P = 0.35), ejection fraction ( P = 0.90), Nakata index ( P = 0.70) and mean pulmonary artery pressure ( P = 0.72) were not significantly different between the groups. No significant survival difference was demonstrated ( P = 0.54). One and 4-year survival rates were both 89.1% ± 4.6% in the APBF group and 87.2% ± 4.9% and 83.4% ± 5.9%, respectively, in the no-APBF group. There was no significant difference in rates of Fontan completion ( P = 0.24), which was achieved in 22 patients from the APBF group (55.0%) and 26 patients from the no-APBF group (65.0%). However, Fontan completion occurred significantly earlier in the no-APBF group ( P < 0.01). In this group, Fontan procedure was performed before 36 months of inter-stage period in 45.9% ± 8.5% of cases (95% CI 31.0-63.7%) compared to only 13.3 ± 5.6% (95% CI 5.8-29.1%) in the APBF group. Conclusions: Our study demonstrates that APBF does not affect survival after BCPS or Fontan completion rate. APBF allows postponing the Fontan procedure without a negative effect on clinical status.

Pseudoaneurysm and aorto-bronchial fistula following balloon dilation of recoarctation.

This case report documents the successful surgical repair of an aorto-bronchial fistula and a giant aortic pseudoaneurysm at the proximal anastomosis of a dacron interposition tube graft that was balloon dilated for recurrent coarctation. Balloon dilation for recoarctation of a dacron interposition tube graft may lead to serious complications.