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Test Code CARGG Comprehensive Arrhythmia Gene Panel, Varies


Ordering Guidance


Customization of this panel and single gene analysis for any gene present on this panel are available. For more information see CGPH / Custom Gene Panel, Hereditary, Next-Generation Sequencing, Varies.

 

Targeted testing for familial variants (also called site-specific or known mutations testing) is available for the genes on this panel. See FMTT / Familial Variant, Targeted Testing, Varies. To obtain more information about this testing option, call 800-533-1710.



Shipping Instructions


Specimen preferred to arrive within 96 hours of collection.



Necessary Information


Prior Authorization is available, but not required, for this test. If proceeding with the prior authorization process, submit the required form with the specimen.



Specimen Required


Patient Preparation: A previous bone marrow transplant from an allogenic donor will interfere with testing. Call 800-533-1710 for instructions for testing patients who have received a bone marrow transplant.

Specimen Type: Whole blood

Container/Tube:

Preferred: Lavender top (EDTA) or yellow top (ACD)

Acceptable: Any anticoagulant

Specimen Volume: 3 mL

Collection Instructions:

1. Invert several times to mix blood.

2. Send whole blood specimen in original tube. Do not aliquot.

Specimen Stability Information: Ambient (preferred)/Refrigerated


Forms

1. New York Clients-Informed consent is required. Document on the request form or electronic order that a copy is on file. The following documents are available:

-Informed Consent for Genetic Testing (T576)

-Informed Consent for Genetic Testing (Spanish) (T826)

2. Hereditary Cardiomyopathies and Arrhythmias Patient Information

3. Comprehensive Arrhythmia Gene Panel (CARGG) Prior Authorization Ordering Instructions

4. If not ordering electronically, complete, print, and send a Cardiovascular Test Request (T724) with the specimen.

Secondary ID

617169

Useful For

Providing a genetic evaluation for patients with a personal or family history suggestive of a hereditary form of cardiac arrhythmia

 

Establishing a diagnosis of a hereditary form of cardiac arrhythmia

Reporting Name

Comprehensive Arrhythmia Gene Panel

Specimen Type

Varies

Specimen Minimum Volume

1 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Varies Varies

Reject Due To

All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.

Clinical Information

Cardiac arrhythmias are a group of conditions characterized by abnormal heart rhythms. Arrhythmias can be caused by either genetic (inherited) factors or nongenetic (acquired) causes such as medications and infection. Hereditary forms of cardiac arrhythmias assessed for on this panel include, but are not limited to, long QT syndrome, short QT syndrome, catecholaminergic polymorphic ventricular tachycardia, and Brugada syndrome, arrhythmogenic right ventricular cardiomyopathy, and familial atrial fibrillation.(1) This panel also assesses genes associated with rarer, syndromic conditions in which cardiac arrhythmia is a major feature, such as Andersen-Tawil syndrome, Carvajal syndrome, Jervell and Lange-Nielsen syndrome, Naxos disease, Timothy syndrome, and Emery-Dreifuss muscular dystrophy.(1-3)

 

Inherited cardiac arrhythmias can follow autosomal dominant, autosomal recessive, X-linked, and digenic patterns of inheritance. Genes associated with mitochondrial inheritance of cardiac arrhythmias are not assessed on this panel.

Reference Values

An interpretive report will be provided

Interpretation

All detected variants are evaluated according to American College of Medical Genetics and Genomics (ACMG) recommendations.(4) Variants are classified based on known, predicted, or possible pathogenicity and reported with interpretive comments detailing their potential or known significance.

Method Description

Next-generation sequencing (NGS) and/or Sanger sequencing is performed to test for the presence of variants in coding regions and intron/exon boundaries of the genes analyzed, as well as some other regions that have known disease-causing variants. The human genome reference GRCh37/hg19 build was used for sequence read alignment. At least 99% of the bases are covered at a read depth over 30X. Sensitivity is estimated at above 99% for single nucleotide variants, above 94% for deletions-insertions (delins) less than 40 base pairs (bp), above 95% for deletions up to 75 bp and insertions up to 47 bp. NGS and/or a polymerase chain reaction-based quantitative method is performed to test for the presence of deletions and duplications in the genes analyzed.

 

There may be regions of genes that cannot be effectively evaluated by sequencing or deletion and duplication analysis as a result of technical limitations of the assay, including regions of homology, high guanine-cytosine (GC) content, and repetitive sequences. See Targeted Genes and Methodology Details for Comprehensive Arrhythmia Gene Panel or details regarding the targeted genes analyzed for each test and specific gene regions not routinely covered.(Unpublished Mayo method)

 

Confirmation of select reportable variants may be performed by alternate methodologies based on internal laboratory criteria.

 

Genes analyzed: ABCC9, ANK2, CACNA1C, CACNA1D, CACNA2D1, CACNB2, CALM1, CALM2 , CALM3, CASQ2, CAV3, CDH2, DES, DSC2, DSG2, DSP, EMD, FLNC, GNB5, HCN4, JUP, KCND2, KCND3, KCNE1, KCNE2, KCNH2, KCNJ2, KCNJ8, KCNQ1, LMNA, NKX2-5, PKP2, PLN, PPA2, PRKAG2, RBM20, RYR2, SCN5A, SLC4A3, TECRL, TMEM43, TNNI3K, TRDN, and TTN

Day(s) Performed

Varies

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. It has not been cleared or approved by the US Food and Drug Administration.

CPT Code Information

81413

LOINC Code Information

Test ID Test Order Name Order LOINC Value
CARGG Comprehensive Arrhythmia Gene Panel 51966-0

 

Result ID Test Result Name Result LOINC Value
617170 Test Description 62364-5
617171 Specimen 31208-2
617172 Source 31208-2
617173 Result Summary 50397-9
617174 Result 82939-0
617175 Interpretation 69047-9
617176 Additional Results 82939-0
617177 Resources 99622-3
617178 Additional Information 48767-8
617179 Method 85069-3
617180 Genes Analyzed 48018-6
617181 Disclaimer 62364-5
617182 Released By 18771-6

Prior Authorization

Insurance preauthorization is available for this testing; forms are available.

 

Patient financial assistance may be available to those who qualify. Patients who receive a bill from Mayo Clinic Laboratories will receive information on eligibility and how to apply.