Valdano Manuel

Cardio-thoracic center - Clínica Girassol Angola
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Atrioventricular Valve Repair in Single Ventricle Physiology: Timing Matters

Objectives: Atrioventricular valve (AVV) regurgitation in patients with single ventricle (SV) physiology severely impacts prognosis; the appropriate timing for surgical treatment is unknown. We sought to study the results of surgical treatment of AVV regurgitation in SV patients and evaluate risk factors for mortality. Methods: Medical records of 81 consecutive patients with moderate or severe AAV regurgitation who were submitted to AVV repair or replacement during any stage of univentricular palliation between January 2013 and May 2017 were examined. We studied demographic data and perioperative factors looking for predictors that might have influenced the results. Binary logistic regression was used to assess the impact on postoperative ventricular dysfunction and mortality. Results: Median age and weight were seven months (interquartile range [IQR]: 3-24) and 5.2 kg (IQR: 3.7-11.2), respectively. Seventy (86.4%) patients underwent AVV repair, and 11 (13.6%) patients underwent AVV replacement. There was an association between AVV repair effectiveness and timing of intervention ( P = .004). Atrioventricular valve intervention at the time of initial surgical palliation was associated with more ineffective repairs ( P = .001), while AVV replacement was more common between Glenn and Fontan procedures ( P = .004). Overall 30-day mortality was 30.5% (25 patients). In-hospital mortality was 49.4%, and it was higher when AVV repair was performed concomitant with initial (stage 1) palliation (64.1% vs 35.7%; P = .01) and when an effective repair was not achieved (75% vs 41%; P = .008). Multivariable analysis identified timing concomitant with stage 1 palliation as an independent risk factor for mortality ( P = .01); meanwhile, an effective repair was a protective factor against in-hospital mortality ( P = .05). Conclusion: Univentricular physiology with AVV regurgitation is a high-risk group of patients. Surgery for AVV regurgitation at stage 1 palliation was associated with less effective repair and higher mortality in this initial experience. On the other hand, effective repair determined better outcomes, highlighting the importance of experience and the learning curve in the management of such patients.

Prognostic value of the preoperative neutrophil‐lymphocyte ratio in patients undergoing the bidirectional Glenn procedure

Introduction

The neutrophil‐lymphocyte ratio (NLR) has been associated with worse outcomes in patients undergoing coronary artery bypass graft surgery. Little is known about this association in the pediatric population who require surgery for congenital heart defects, especially in patients with a single ventricle (SV).

Objective

To analyze the association of the preoperative NLR with outcomes in patients undergoing the bidirectional Glenn procedure.

Methods

This study involved a retrospective cohort analysis of 141 consecutive patients with SV undergoing the bidirectional Glenn procedure between January 2011 and December 2017 in two centers. The preoperative NLR was included in the last hemogram test before surgery. According to the NLR level, the patients were divided into group I (NLR < 1), group II (NLR between 1 and 2), and group III (NLR > 2). The primary endpoint was total hospital length of stay (LOS), and secondary endpoints were mechanical ventilation (MV) time, intensive care unit (ICU) LOS, ventricular dysfunction, complications, and middle‐term mortality.

Results

The average follow‐up duration was 48 months. There were 61, 47, and 33 patients in groups I, II, and III, respectively. Patients in group III exhibited an increased risk of prolonged total hospital LOS (P = .00). An increase in MV time (P = .03) and ICU LOS (P = .02) was also observed in this group, and these patients experienced greater mortality in 24 months following the surgery (P = .03). There was no association between the NLR and ventricular dysfunction (P = .26) and complications (P = .46).

Conclusion

A high preoperative NLR was associated with worse outcomes in patients with SV physiology undergoing the bidirectional Glenn procedure.

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