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Congenital Heart Defects and Genetic Syndromes

Preetha Tilak, Consultant, Division of Human Genetics,Department of Anatomy, St.John’sMedical College, Bangalore, Karnataka 560034, India. , Preetha Tilak* , Sonia Dhawan** , Sayee Rajangam***

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Indian Journal of Genetics and Molecular Research 6(2):p 37-45, Jul-Dec 2017. | DOI: http://dx.doi.org/10.21088/ijgmr.2319.4782.6217.1

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Abstract

Congenital heart defects may be because of genetic and or environmental factors. Genetic could be Mendelian and non-Mendeliandisorders resulting in syndromes. Aim: The paper reports the identified Mendelianand non-mendelian syndromes in patients with congenital heart defects. Material and Method: 65 patients with heart defectswere referred for karyotyping and counseling. The details were recorded in proforma. Percentage analysis was calculated. Results: Genetic syndromes were identified in 11 patients (11/65,16.92%). There were 4 female and 7 male patients. All had normal karyotype: 46,XX or 46,XY. Among them 6 (54.5%) were born to consanguinous parents; out of whom 4 were 1st cousin unions, one each was from uncleniece and distant relation. 7 had Mendelian and 4 had non-Mendelian disorders. The Mendelian were autosomal dominant (AD) or recessive (AR). AD was in one case of Marfan syndrome (male). AR was in the following 6 syndromes: Acrocallosal (male)/ Bixler (female)/ Diastrophic dysplasia (male)/ Ellis-van Crevald (female)/ Fanconi pancytopenia (male)/ Smith-LemliOpitz (male). Among the 4 non-Mendelian; 2 were sporadic: Beckwith Wiedmann (male) and CHARGE association (female) and the other 2 were ?AD (Brachymelia-Renal syndrome (male) and ?AR (Klippel Fell sequence)(female). Conclusion: As per the mode of inheritance, genetic counseling was provided to the family.

 


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DOI: http://dx.doi.org/10.21088/ijgmr.2319.4782.6217.1

Keywords

Heart Defects; Syndromes; Genetic Counseling. 

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