Korean Circulation Journal

The Korean Society of Cardiology (대한심장학회)
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Coupling Interval Ratio Is Associated with Ventricular Premature Complex-Related Symptoms

  • Park, Kyoung-Min (Division of Cardiology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine) ;
  • Im, Sung Il (Division of Cardiology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine) ;
  • Chun, Kwang Jin (Division of Cardiology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine) ;
  • Hwang, Jin Kyung (Division of Cardiology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine) ;
  • Park, Seung-Jung (Division of Cardiology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine) ;
  • Kim, June Soo (Division of Cardiology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine) ;
  • On, Young Keun (Division of Cardiology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine)
  • Received : 2014.12.25
  • Accepted : 2015.03.17
  • Published : 2015.07.30
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Abstract

Background and Objectives: Frequent ventricular premature complex (VPC) is one of the most common arrhythmia syndromes. Symptoms observed frequently with this arrhythmia syndrome remain limited. We sought to identify predictors of VPC-related symptoms by analyzing demographic information, VPC burden, and VPC surface electrocardiogram characteristics. Subjects and Methods: We prospectively enrolled 109 patients with idiopathic outflow tract VPCs (63 males, $49{\pm}16$ years old). They were divided into Group A (n=30, without VPC-related symptoms of palpitations or "dropped beats") and Group B (n=79, with VPC-related symptoms). Measured parameters were sinus and VPC QRS width, coupling interval (CI) between the previous sinus beat and VPC, CI ratio (%, CI/sinus cycle length), post-VPC CI and CI ratio, and VPC amplitude. Results: Both groups had similar age (p=0.22), daily VPC burden (p=0.15), and VPC site of origin (p=0.36). The VPC CI ratio was higher in Group B ($60{\pm}15%$) than in Group A ($49{\pm}22%$) (p=0.01). Conclusion: VPC-related symptoms are associated with a higher VPC CI ratio (>50%). The physiologic basis for these results deserves further study.

Keywords

References

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