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Mitral Valve Surgery in the First Year of Life

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Abstract

Data are limited on outcomes associated with mitral valve surgery in infants. Prior studies report high mortality and increased risk for late cardiac failure particularly for those with mitral stenosis. We sought to evaluate outcomes in patients with mitral stenosis (MS) or regurgitation (MR) who had mitral valvuloplasty or replacement in the first year of life. A retrospective analysis of all patients in a single institution who underwent mitral valvuloplasty or replacement in their first year of life from 2004 to 2016 (n = 25), excluding patients with single ventricle pathology or those undergoing surgery for atrioventricular canal defect, was carried out. Median age and weight at surgery were 76.5 days (range 2–329) and 4.5 kg (range 3.0–10.1), respectively. The primary mitral pathology was MR in 16 and MS in 9 patients. Median follow-up among living patients was 4 years (range 106 days–12.3 years). Overall survival was 96% at 30 days and 87.8% at 1, 5, and 10 years. There were three early deaths (12%), all within 6 weeks of surgery. There were no late deaths. Three patients required valve replacement, 1 of which had a primary mitral valve replacement and died within 30 days of surgery. Re-intervention-free survival (surgical and catheter based) was 83.8%, 73.3%, and 48.9% at 1, 5, and 10 years per Kaplan–Meier estimates. There was no difference in re-intervention-free survival between patients with MR versus MS. No risk factors for death or re-intervention were identified. Mitral valvuloplasty and replacement can be performed in infants under 1 year of age with acceptable survival and need for re-intervention.

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Abbreviations

ALCAPA:

Anomalous left coronary artery from the pulmonary artery

ASD:

Atrial septal defect

ASO:

Arterial switch operation

Coarct:

Coarctation of the aorta

DILV:

Double inlet left ventricle

DORV:

Double outlet right ventricle

ECMO:

Extracorporeal membrane oxygenation

LVOTO:

Left ventricular outflow tract obstruction

LVEDd:

Left ventricular end systolic dimension

MR:

Mitral regurgitation

MS:

Mitral stenosis

PDA:

Patent ductus arteriosus

PFO:

Patent foramen ovale

PS:

Pulmonary stenosis

SF:

Shortening fraction

TGA:

Transposition of the great arteries

TEE:

Transesophageal echocardiography

TTE:

Transthoracic echocardiography

VSD:

Ventricular septal defect

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Acknowledgements

We would like to thank Dr. Robert Jaquiss for his guidance and mentorship in the presentation of this project.

Funding

No funding source was obtained for preparation of this study.

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Authors

Contributions

All authors contributed to the study conception and design. Conceptualization: KG and JF methodology; KG, TP, and RD material preparation, data collection and analysis; TG, TP, JP, and AD the first draft of the manuscript was written by TG and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Tracy R. Geoffrion.

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The authors declare that they have no conflict of interest or disclosures.

Ethical Approval

This retrospective study is in accordance with the ethical standards of the institution and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

Research Involving with Humans and Animals Rights

This article does not contain any studies with human participants or animals performed by any of the authors.

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The need for informed consent was waived by the IRB.

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Geoffrion, T.R., Pirolli, T.J., Pruszynski, J. et al. Mitral Valve Surgery in the First Year of Life. Pediatr Cardiol 41, 334–340 (2020). https://doi.org/10.1007/s00246-019-02262-5

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