J Korean Soc Biol Psychiatry.  2004 Jun;11(1):49-53.

Association of Antipsychotic-Induced QTc Prolongation with 5-HTTLPR

• Seo BJ
• Rhee JG
• Park SW
• Kong BG
• Chung DO
• Kim YH

Abstract

OBJECTIVE
A Comparison of QTc prolongation for various antipsychotics and an analysis of QTc prolongation for the various types of serotonin transporter polymorphism were performed. METHOD: EKG was checked, followed by QTc measurement as Bazett's correction, and the serotonin transporter polymorphism was examined in 110 chronic schizophrenia patients were performed EKG before 24 weeks ago. We defiened QTc prolongation as over 450ms. The risk factor of sudden cardiac death were defiend as QTc prolongation and or 60ms in delta value. RESULT: The prevalence of QTc prolongation in this study was 7.3%, and the prevalence of over 60ms was 4.5%. Patients who had the risk factors were 10(9.1%). 6/52 who prescribed atypical antipsychotics and 2/58 who prescribed haloperidol showed QTc prolongation. The prevalence who had the risk factor of sudden cardiac death were 16% in atypical antipsychotics group, 3.4% in haloperidol group. QTc prolongation were observed more frequently in l/l type than s/s type. l allele frequency were 50% in QTc prolongated group, 19% in not prolongated group. l allele had an association with QTc prolongation(p<0.01).
CONCLUSION
The prevalence of QTc prolongatin was frequent in chronic schizophrenia patients who were prescribed atypical antipsychotics. It has strong association with l allele of 5-HTTLPR.

MeSH Terms

Alleles
Antipsychotic Agents
Death, Sudden, Cardiac
Electrocardiography
Gene Frequency
Haloperidol
Humans
Prevalence
Risk Factors
Schizophrenia
Serotonin Plasma Membrane Transport Proteins
Antipsychotic Agents
Haloperidol
Serotonin Plasma Membrane Transport Proteins