Functional characteristics and inducibility of atrioventricular nodal re-entry in rabbits of different ages

Jieh-Neng Wang, Jing-Ming Wu, Wen Shiann Wu, Li Jen Lin

研究成果: Article

1 引文 (Scopus)

摘要

Aims Many issues regarding atrioventricular nodal re-entry (AVNR) remain unexplored; however, no stable animal model for the study of AVNR has yet been developed. Clinically, AVNR is found more commonly in adults than children. We attempt to characterize AV nodal functional properties and inducibility of AVNRT using rabbits of three different age groups since we hypothesize that the inducibility of AVNR may increase as the subject ages.Methods and resultsWe evaluated the inducibility of AVNR and the functional characteristics of the AV node in 6-month-old (Group 1), 2-month-old (Group 2), and at 1-week-old (Group 3) rabbits using a well-established rabbit heart model. We found that the inducibility of AVNR was higher in the 2-month-old group, compared with the 1-week-old group (30). There was no functional difference between the two older groups (6-month-old and 2-month-old groups), however the youngest group (Group 3) showed better AV nodal functional properties. Regarding the correlation between inducibility and nodal functional properties, subgroups with AVNR demonstrated a longer AH maximum (AHmax) compared with the non-re-entry group, although there is no difference in age-adjusted AHmax. Regarding the correlation between inducibility and nodal functional properties, for the 1-week-old rabbits, subgroups with AVNR demonstrated a shorter AH minimum compared with the non-re-entry group (39.0 vs. 61.0, P = 0.017).ConclusionOur results demonstrate that both 2-month-old and 6-month-old rabbits represent stable models for AVNR. Longer AH conduction time may lead to greater re-entry inducibility.

原文English
頁(從 - 到)1011-1018
頁數8
期刊Europace
12
發行號7
DOIs
出版狀態Published - 2010 一月 1

指紋

Rabbits
Atrioventricular Node
Animal Models
Age Groups

All Science Journal Classification (ASJC) codes

  • Cardiology and Cardiovascular Medicine
  • Physiology (medical)

引用此文

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title = "Functional characteristics and inducibility of atrioventricular nodal re-entry in rabbits of different ages",
abstract = "Aims Many issues regarding atrioventricular nodal re-entry (AVNR) remain unexplored; however, no stable animal model for the study of AVNR has yet been developed. Clinically, AVNR is found more commonly in adults than children. We attempt to characterize AV nodal functional properties and inducibility of AVNRT using rabbits of three different age groups since we hypothesize that the inducibility of AVNR may increase as the subject ages.Methods and resultsWe evaluated the inducibility of AVNR and the functional characteristics of the AV node in 6-month-old (Group 1), 2-month-old (Group 2), and at 1-week-old (Group 3) rabbits using a well-established rabbit heart model. We found that the inducibility of AVNR was higher in the 2-month-old group, compared with the 1-week-old group (30). There was no functional difference between the two older groups (6-month-old and 2-month-old groups), however the youngest group (Group 3) showed better AV nodal functional properties. Regarding the correlation between inducibility and nodal functional properties, subgroups with AVNR demonstrated a longer AH maximum (AHmax) compared with the non-re-entry group, although there is no difference in age-adjusted AHmax. Regarding the correlation between inducibility and nodal functional properties, for the 1-week-old rabbits, subgroups with AVNR demonstrated a shorter AH minimum compared with the non-re-entry group (39.0 vs. 61.0, P = 0.017).ConclusionOur results demonstrate that both 2-month-old and 6-month-old rabbits represent stable models for AVNR. Longer AH conduction time may lead to greater re-entry inducibility.",
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Functional characteristics and inducibility of atrioventricular nodal re-entry in rabbits of different ages. / Wang, Jieh-Neng; Wu, Jing-Ming; Wu, Wen Shiann; Lin, Li Jen.

於: Europace, 卷 12, 編號 7, 01.01.2010, p. 1011-1018.

研究成果: Article

TY - JOUR

T1 - Functional characteristics and inducibility of atrioventricular nodal re-entry in rabbits of different ages

AU - Wang, Jieh-Neng

AU - Wu, Jing-Ming

AU - Wu, Wen Shiann

AU - Lin, Li Jen

PY - 2010/1/1

Y1 - 2010/1/1

N2 - Aims Many issues regarding atrioventricular nodal re-entry (AVNR) remain unexplored; however, no stable animal model for the study of AVNR has yet been developed. Clinically, AVNR is found more commonly in adults than children. We attempt to characterize AV nodal functional properties and inducibility of AVNRT using rabbits of three different age groups since we hypothesize that the inducibility of AVNR may increase as the subject ages.Methods and resultsWe evaluated the inducibility of AVNR and the functional characteristics of the AV node in 6-month-old (Group 1), 2-month-old (Group 2), and at 1-week-old (Group 3) rabbits using a well-established rabbit heart model. We found that the inducibility of AVNR was higher in the 2-month-old group, compared with the 1-week-old group (30). There was no functional difference between the two older groups (6-month-old and 2-month-old groups), however the youngest group (Group 3) showed better AV nodal functional properties. Regarding the correlation between inducibility and nodal functional properties, subgroups with AVNR demonstrated a longer AH maximum (AHmax) compared with the non-re-entry group, although there is no difference in age-adjusted AHmax. Regarding the correlation between inducibility and nodal functional properties, for the 1-week-old rabbits, subgroups with AVNR demonstrated a shorter AH minimum compared with the non-re-entry group (39.0 vs. 61.0, P = 0.017).ConclusionOur results demonstrate that both 2-month-old and 6-month-old rabbits represent stable models for AVNR. Longer AH conduction time may lead to greater re-entry inducibility.

AB - Aims Many issues regarding atrioventricular nodal re-entry (AVNR) remain unexplored; however, no stable animal model for the study of AVNR has yet been developed. Clinically, AVNR is found more commonly in adults than children. We attempt to characterize AV nodal functional properties and inducibility of AVNRT using rabbits of three different age groups since we hypothesize that the inducibility of AVNR may increase as the subject ages.Methods and resultsWe evaluated the inducibility of AVNR and the functional characteristics of the AV node in 6-month-old (Group 1), 2-month-old (Group 2), and at 1-week-old (Group 3) rabbits using a well-established rabbit heart model. We found that the inducibility of AVNR was higher in the 2-month-old group, compared with the 1-week-old group (30). There was no functional difference between the two older groups (6-month-old and 2-month-old groups), however the youngest group (Group 3) showed better AV nodal functional properties. Regarding the correlation between inducibility and nodal functional properties, subgroups with AVNR demonstrated a longer AH maximum (AHmax) compared with the non-re-entry group, although there is no difference in age-adjusted AHmax. Regarding the correlation between inducibility and nodal functional properties, for the 1-week-old rabbits, subgroups with AVNR demonstrated a shorter AH minimum compared with the non-re-entry group (39.0 vs. 61.0, P = 0.017).ConclusionOur results demonstrate that both 2-month-old and 6-month-old rabbits represent stable models for AVNR. Longer AH conduction time may lead to greater re-entry inducibility.

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