Referenced in: none

Automatically associated channels: Cav1.2 , Kv11.1 , Kv7.1 , Nav1.5

Title: Sudden cardiac arrest during anesthesia in a 30-month-old boy with syndactyly: a case of genetically proven Timothy syndrome.

Authors: Hyo Soon An, Eun Young Choi, Bo Sang Kwon, Gi Beom Kim, Eun Jung Bae, Chung Il Noh, Jung Yun Choi, Sung Sup Park

Journal, date & volume: J. Korean Med. Sci., 2013 May , 28, 788-91

PubMed link: http://www.ncbi.nlm.nih.gov/pubmed/23678275

Abstract
Timothy syndrome, long QT syndrome type 8, is highly malignant with ventricular tachyarrhythmia. A 30-month-old boy had sudden cardiac arrest during anesthesia induction before plastic surgery for bilateral cutaneous syndactyly. After successful resuscitation, prolonged QT interval (QTc, 0.58-0.60 sec) and T-wave alternans were found in his electrocardiogram. Starting β-blocker to prevent further tachycardia and collapse event, then there were no more arrhythmic events. The genes KCNQ1, KCNH2, KCNE1 and 2, and SCN5A were negative for long QT syndrome. The mutation p.Gly406Arg was confirmed in CACNA1C, which maintains L-type calcium channel depolarization in the heart and other systems.