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Delayed Repercussions of Blunt Trauma: Isolated Muscular Ventricular Septal Defect.

ABSTRACT: Highlights•Large isolated ventricular septal defect resulting from blunt trauma can be associated with high morbidity and mortality.•High index of suspicion and rapid diagnosis with echocardiography are needed for proper management of isolated ventricular septal defect following blunt trauma.•Surgical patch repair or percutaneous VSD closure, when appropriate, are the mainstay of interventions to avoid late morbidity and mortality associated with large unrepaired VSD.

SUBMITTER: Al-Hijji MA

PROVIDER: S-EPMC6034488 | biostudies-other | 2017 Feb

REPOSITORIES: biostudies-other

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Project description:BackgroundVentricular septal defect (VSD) is the most common congenital heart disease. Although a small number of genes associated with VSD have been found, the genetic factors of VSD remain unclear. In this study, we evaluated the association of 10 candidate single nucleotide polymorphisms (SNPs) with isolated VSD in a population from Southwest China.MethodsBased on the results of 34 congenital heart disease whole-exome sequencing and 1000 Genomes databases, 10 candidate SNPs were selected. A total of 618 samples were collected from the population of Southwest China, including 285 VSD samples and 333 normal samples. Ten SNPs in the case group and the control group were identified by SNaPshot genotyping. The chi-square (χ2) test was used to evaluate the relationship between VSD and each candidate SNP. The SNPs that had significant P value in the initial stage were further analysed using linkage disequilibrium, and haplotypes were assessed in 34 congenital heart disease whole-exome sequencing samples using Haploview software. The bins of SNPs that were in very strong linkage disequilibrium were further used to predict haplotypes by Arlequin software. ViennaRNA v2.5.1 predicted the haplotype mRNA secondary structure. We evaluated the correlation between mRNA secondary structure changes and ventricular septal defects.ResultsThe χ2 results showed that the allele frequency of FLT4 rs383985 (P = 0.040) was different between the control group and the case group (P < 0.05). FLT4 rs3736061 (r2 = 1), rs3736062 (r2 = 0.84), rs3736063 (r2 = 0.84) and FLT4 rs383985 were in high linkage disequilibrium (r2 > 0.8). Among them, rs3736061 and rs3736062 SNPs in the FLT4 gene led to synonymous variations of amino acids, but predicting the secondary structure of mRNA might change the secondary structure of mRNA and reduce the free energy.ConclusionsThese findings suggest a possible molecular pathogenesis associated with isolated VSD, which warrants investigation in future studies.

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Delayed Repercussions of Blunt Trauma: Isolated Muscular Ventricular Septal Defect.

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