Related Experiment Video
Updated: Mar 17, 2026

Isolation and Kv Channel Recordings in Murine Atrial and Ventricular Cardiomyocytes
Published on: March 12, 2013
KCNN2 polymorphisms and cardiac tachyarrhythmias.
Chih-Chieh Yu1, Tsai Chia-Ti, Pei-Lung Chen
1Department of Internal Medicine, National Taiwan University Hospital Graduate Institute of Clinical Medicine, College of Medicine, National Taiwan University Department of Medical Genetics, National Taiwan University Hospital Graduate Institute of Medical Genomics and Proteomics, College of Medicine Research Center for Developmental Biology and Regenerative Medicine, National Taiwan University, Taipei Department of Internal Medicine, National Taiwan University Hospital, Yun-Lin Branch, Yun-Lin, Taiwan Krannert Institute of Cardiology and Division of Cardiology, Department of Medicine, Indiana University School of Medicine, Indianapolis, IN, USA Graduate Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan.
Genetic variations in the KCNN2 gene are linked to ventricular tachyarrhythmias (VTa) in humans, suggesting KCNN2 as a potential marker for sudden cardiac death risk stratification. These findings highlight the role of KCNN2 in cardiac electrophysiology.
Area of Science:
- Cardiovascular Genetics
- Molecular Cardiology
- Electrophysiology
Background:
- Potassium calcium-activated channel subfamily N member 2 (KCNN2) encodes small-conductance calcium-activated potassium (SK) channels.
- SK channels are implicated in cardiac repolarization and arrhythmogenesis in animal models.
- The role of SK channels in human cardiac arrhythmias remains under investigation.
Purpose of the Study:
- To investigate the association between genetic polymorphisms in the KCNN2 gene and the occurrence of cardiac tachyarrhythmias in a human population.
- To evaluate the potential of KCNN2 variants as markers for sudden cardiac death risk.
Main Methods:
- Genotyping of 12 single nucleotide polymorphisms (SNPs) in the KCNN2 gene in 327 Han Chinese individuals.
- Study groups included patients with ventricular tachyarrhythmias (VTa), atrial fibrillation (AF), and normal controls.
- Statistical analysis using additive and dominant models, with adjustments for potential risk factors.
Main Results:
- Two KCNN2 variants (rs13184658 and rs10076582) were significantly associated with VTa.
- These variants showed population attributable risks of 17.3% and 10.6% for VTa, respectively.
- One variant (rs13184658) showed a weak but significant association with atrial fibrillation (AF).
Conclusions:
- KCNN2 gene variants are significantly associated with clinically significant ventricular tachyarrhythmias (VTa).
- KCNN2 variants may serve as adjunctive markers for risk stratification in patients at risk of sudden cardiac death (SCD).
- Further research is warranted to elucidate the precise mechanisms linking KCNN2 to cardiac arrhythmias.
More Related Videos
09:36Dual-Dye Optical Mapping of Hearts from RyR2R2474S Knock-In Mice of Catecholaminergic Polymorphic Ventricular Tachycardia
Published on: December 22, 2023
07:15Determining the Likelihood of Variant Pathogenicity Using Amino Acid-level Signal-to-Noise Analysis of Genetic Variation
Published on: January 16, 2019
Related Concept Videos
Mechanism of Cardiac Arrhythmias
Dysrhythmias II: Classification of Tachyarrhythmias
Antiarrhythmic Drugs: Class II Agents as β-Adrenergic Blockers
Dysrhythmias III: Characteristics of Dysrhythmias
Pharmacogenetic Phenotypes: Alterations in Pharmacokinetics, Drug Targets and Biologic Milieu
Disturbances in Heart Rhythm
Arrhythmias are categorized by their speed, rhythm, and origin. A slow heart...