Developmental changes of atrioventricular nodal recovery properties

Meng Hsun Lin, Ming Lon Young, Jing Ming Wu, Grace S. Wolff

研究成果: Article同行評審

15 引文 斯高帕斯(Scopus)

摘要

Atrioventricular (AV) nodal recovery properties can be studied by a periodic premature stimulation protocol performed at a slow basic rate. Developmental aspects of these properties have not been determined. The purpose of this study was to determine the developmental changes of AV nodal recovery properties. Forty-three children and young adults (male:female ratio 25:18) without AV nodal disease (aged 3.3 to 21.9 years) were studied by delivering premature atrial extrastimuli coupled to basic driven atrial beats. The individual recovery curve was tilted to the equation: A2H2 = Aorta + exp(α -H1A2/τ) for H1A2 ≤θ, where A0H0 is the minimum AH interval, H1A2 is any recovery interval that exceeds the nodal effective refractory period, A2H2 is the corresponding nodal conduction time at any given H1A2, α is a constant, τ is the recovery time constant, and θ is the nodal effective refractory period. We found that: (1) A0H0 and a constant did not change significantly with age, (2) both τ (r = 0.324; p <0.05) and θ (r = 0.401; p <0.05) had a positive correlation with age; and (3) the maximum change in A2H2 with a 10-ms decrement in H1A2 was 32 ms and did not change significantly with age. Our results suggest that AV nodal recovery properties are age-dependent and both the recovery time constant and effective refractory period lengthen with age.

原文English
頁(從 - 到)1178-1182
頁數5
期刊American Journal of Cardiology
80
發行號9
DOIs
出版狀態Published - 1997 十一月 1

All Science Journal Classification (ASJC) codes

  • 心臟病學與心血管醫學

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