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KMID : 0368120150450040294
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Korean Circulation Journal
2015 Volume.45 No. 4 p.294 ~ p.300
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Coupling Interval Ratio Is Associated with Ventricular Premature Complex-Related Symptoms
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Park Kyoung-Min
Im Sung-Il
Chun Kwang-Jin
Hwang Jin-Kyung
Park Seung-Jung
Kim June-Soo
On Young-Keun
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Abstract
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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±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±15%) than in Group A (49±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.
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KEYWORD
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Ventricular premature complexes, Arrhythmias, cardiac, Electrocardiography
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