Atrial Fibrillation Panel

SEQmethod-seq-icon Our Sequence Analysis is based on a proprietary targeted sequencing method OS-Seq™ and offers panels targeted for genes associated with certain phenotypes. A standard way to analyze NGS data for finding the genetic cause for Mendelian disorders. Results in 21 days. DEL/DUPmethod-dup-icon Targeted Del/Dup (CNV) analysis is used to detect bigger disease causing deletions or duplications from the disease-associated genes. Results in 21 days. PLUSmethod-plus-icon Plus Analysis combines Sequence + Del/Dup (CNV) Analysis providing increased diagnostic yield in certain clinical conditions, where the underlying genetic defect may be detectable by either of the analysis methods. Results in 21 days.

Test code: CA2001

The Blueprint Genetics Atrial Fibrillation Panel is a 22-gene test for genetic diagnostics of patients with clinical suspicion of a familial form of atrial fibrillation.

Familial atrial fibrillation is a rare disorder and appears to be inherited in an autosomal dominant pattern. Genetic diagnosis can confirm the clinical diagnosis of familial atrial fibrillation and reveal the arrhythmia mechanisms. Genetic diagnosis can also guide risk assessment and treatment strategies. Identifying the genetc cause enables risk assessment among asymptomatic family members.

About Atrial Fibrillation

Atrial fibrillation is characterized by uncoordinated electrical activity in the atria. This causes the heartbeat to become fast and irregular. If untreated, this aarrhythmia can lead to chest pain, dizziness, palpitations, shortness of breath, or syncope. Atrial fibrillation also increases the risk of stroke and sudden death. Complications of familial atrial fibrillation can occur at any age, although some people with this heart condition never experience any health problems associated with the disorder. Atrial fibrillation is the most common type of sustained arrhythmia, affecting more than 3 million people in the United States. The risk of developing atrial fibrillation increases with age. The incidence of the familial form of atrial fibrillation is unknown. Recent studies have suggested that up to 30 percent of all patients with atrial fibrillation may have a family history of the condition.

Availability

Results in 3-4 weeks. We do not offer a maternal cell contamination (MCC) test at the moment. We offer prenatal testing only for cases where the maternal cell contamination studies (MCC) are done by a local genetic laboratory. Read more.

Genes in the Atrial Fibrillation Panel and their clinical significance
GeneAssociated phenotypesInheritanceClinVarHGMD
ABCB4Gallbladder disease, Low phospholipid-associated cholelithiasis, CholestasisAD/AR16202
CACNA2D4Retinal cone dystrophyAR19
CACNB2Brugada syndromeAD418
GATA6Heart defects, congenital, and other congenital anomaliesAD1568
GJA5Progressive familial heart block, Atrial standstill, digenic, Atrial fibrillationAD/Digenic735
HCN4Sick sinus syndrome, Brugada syndromeAD724
KCNA5Atrial fibrillationAD424
KCND3Brugada syndromeAD615
KCNE1Long QT syndrome, Jervell and Lange-Nielsen syndromeAD/AR/Digenic646
KCNE2Long QT syndrome, Atrial fibrillation, familialAD623
KCNH2Short QT syndrome, Long QT syndromeAD275897
KCNJ2Short QT syndrome, Andersen syndrome, Long QT syndrome, Atrial fibrillationAD3483
KCNJ5Long QT syndrome, Hyperaldosteronism, familialAD712
KCNQ1Short QT syndrome, Long QT syndrome, Atrial fibrillation, Jervell and Lange-Nielsen syndromeAD/AR/Digenic237590
LDB3Dilated cardiomyopathy (DCM), Myopathy, myofibrillarAD1011
LMNAHeart-hand syndrome, Slovenian, Limb-girdle muscular dystrophy, Muscular dystrophy, congenital, LMNA-related, Lipodystrophy (Dunnigan), Emery-Dreiffus muscular dystrophy, Malouf syndrome, Dilated cardiomyopathy (DCM), Mandibuloacral dysplasia type A, Progeria Hutchinson-Gilford typeAD/AR183458
RYR2Ventricular tachycardia, catecholaminergic polymorphic, Arrhythmogenic right ventricular dysplasiaAD114287
SCN1BAtrial fibrillation, Brugada syndrome, Generalized epilepsy with febrile seizures plusAD1118
SCN3BAtrial fibrillation, familial, Brugada syndromeAD47
SCN5AHeart block, nonprogressive, Heart block, progressive, Long QT syndrome, Ventricular fibrillation, Atrial fibrillation, Sick sinus syndrome, Brugada syndrome, Dilated cardiomyopathy (DCM)AD/AR/Digenic193795
SCN10AParoxysmal extreme pain disorder, Channelopathy-associated congenital insensitivity to pain, Primary erythermalgia, Sodium channelopathy-related small fiber neuropathy, Brugada syndromeAD/AR248
TBX5Holt-Oram syndromeAD32119

Gene, refers to HGNC approved gene symbol; Inheritance to inheritance patterns such as autosomal dominant (AD), autosomal recessive (AR) and X-linked (XL); ClinVar, refers to a number of variants in the gene classified as pathogenic or likely pathogenic in ClinVar (http://www.ncbi.nlm.nih.gov/clinvar/); HGMD, refers to a number of variants with possible disease association in the gene listed in Human Gene Mutation Database (HGMD, http://www.hgmd.cf.ac.uk/ac/). The list of associated (gene specific) phenotypes are generated from CDG (http://research.nhgri.nih.gov/CGD/) or Orphanet (http://www.orpha.net/) databases.

Blueprint Genetics offers a comprehensive Atrial Fibrillation Panel that covers classical genes associated with abnormal ECG, chronic atrial fibrillation, paroxysmal atrial fibrillation, persistent atrial fibrillation and syncope and collapse. The genes are carefully selected based on the existing scientific evidence, our experience and most current mutation databases. Candidate genes are excluded from this first-line diagnostic test. The test does not recognise balanced translocations or complex inversions, and it may not detect low-level mosaicism. The test should not be used for analysis of sequence repeats or for diagnosis of disorders caused by mutations in the mitochondrial DNA.

Analytical validation is a continuous process at Blueprint Genetics. Our mission is to improve the quality of the sequencing process and each modification is followed by our standardized validation process. Average sensitivity and specificity in Blueprint NGS Panels is 99.3% and 99.9% for detecting SNPs. Sensitivity to for indels vary depending on the size of the alteration: 1-10bps (96.0%), 11-20 bps (88.4%) and 21-30 bps (66.7%). The longest detected indel was 46 bps by sequence analysis. Detection limit for Del/Dup (CNV) analysis varies through the genome depending on exon size, sequencing coverage and sequence content. The sensitivity is 71.5% for single exon deletions and duplications and 99% for three exons’ deletions and duplications. We have validated the assays for different starting materials including EDTA-blood, isolated DNA (no FFPE) and saliva that all provide high-quality results. The diagnostic yield varies substantially depending on the used assay, referring healthcare professional, hospital and country. Blueprint Genetics’ Plus Analysis (Seq+Del/Dup) maximizes the chance to find molecular genetic diagnosis for your patient although Sequence Analysis or Del/Dup Analysis may be cost-effective first line test if your patient’s phenotype is suggestive for a specific mutation profile.

The sequencing data generated in our laboratory is analyzed with our proprietary data analysis and annotation pipeline, integrating state-of-the art algorithms and industry-standard software solutions. Incorporation of rigorous quality control steps throughout the workflow of the pipeline ensures the consistency, validity and accuracy of results. The highest relevance in the reported variants is achieved through elimination of false positive findings based on variability data for thousands of publicly available human reference sequences and validation against our in-house curated mutation database as well as the most current and relevant human mutation databases. Reference databases currently used are the 1000 Genomes Project (http://www.1000genomes.org), the NHLBI GO Exome Sequencing Project (ESP; http://evs.gs.washington.edu/EVS), the Exome Aggregation Consortium (ExAC; http://exac.broadinstitute.org), ClinVar database of genotype-phenotype associations (http://www.ncbi.nlm.nih.gov/clinvar) and the Human Gene Mutation Database (http://www.hgmd.cf.ac.uk). The consequence of variants in coding and splice regions are estimated using the following in silico variant prediction tools: SIFT (http://sift.jcvi.org), Polyphen (http://genetics.bwh.harvard.edu/pph2/), and Mutation Taster (http://www.mutationtaster.org).

Through our online ordering and statement reporting system, Nucleus, the customer can access specific details of the analysis of the patient. This includes coverage and quality specifications and other relevant information on the analysis. This represents our mission to build fully transparent diagnostics where the customer gains easy access to crucial details of the analysis process.

In addition to our cutting-edge patented sequencing technology and proprietary bioinformatics pipeline, we also provide the customers with the best-informed clinical report on the market. Clinical interpretation requires fundamental clinical and genetic understanding. At Blueprint Genetics our geneticists and clinicians, who together evaluate the results from the sequence analysis pipeline in the context of phenotype information provided in the requisition form, prepare the clinical statement. Our goal is to provide clinically meaningful statements that are understandable for all medical professionals, even without training in genetics.

Variants reported in the statement are always classified using the Blueprint Genetics Variant Classification Scheme modified from the ACMG guidelines (Richards et al. 2015), which has been developed by evaluating existing literature, databases and with thousands of clinical cases analyzed in our laboratory. Variant classification forms the corner stone of clinical interpretation and following patient management decisions. Our statement also includes allele frequencies in reference populations and in silico predictions. We also provide PubMed IDs to the articles or submission numbers to public databases that have been used in the interpretation of the detected variants. In our conclusion, we summarize all the existing information and provide our rationale for the classification of the variant.

A final component of the analysis is the Sanger confirmation of the variants classified as likely pathogenic or pathogenic. This does not only bring confidence to the results obtained by our NGS solution but establishes the mutation specific test for family members. Sanger sequencing is also used occasionally with other variants reported in the statement. In the case of variant of uncertain significance (VUS) we do not recommend risk stratification based on the genetic finding. Furthermore, in the case VUS we do not recommend use of genetic information in patient management or genetic counseling. For some cases Blueprint Genetics offers a special free of charge service to investigate the role of identified VUS.

We constantly follow genetic literature adapting new relevant information and findings to our diagnostics. Relevant novel discoveries can be rapidly translated and adopted into our diagnostics without delay. These processes ensure that our diagnostic panels and clinical statements remain the most up-to-date on the market.

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ICD & CPT codes

CPT codes

SEQ81479
DEL/DUP81479

Accepted sample types

  • EDTA blood, min. 1 ml
  • Purified DNA, min. 5μg
  • Saliva (Oragene DNA OG-500 kit)

Label the sample tube with your patient’s name, date of birth and the date of sample collection.

Note that we do not accept DNA samples isolated from formalin-fixed paraffin-embedded (FFPE) tissue.

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