Abstract:
BACKGROUND:Some patients with ongoing heart failure symptoms after treatment with cardiac resynchronization therapy (CRT) demonstrate QRS prolongation during exercise. We investigated whether the optimal CRT pacing configuration changes during dobutamine stress. METHODS:Seven patients undergoing CRT implantation underwent invasive LV dP/dTmax measurement during CRT pacing in 10 configurations to determine the optimal baseline pacing configuration (OPC). Measurements were repeated during dobutamine infusion. Differences in mean LV dP/dTmax between pacing configurations were compared. RESULTS:Baseline OPC differed from stress OPC in 6/7 patients. The mean (SD) LV dP/dTmax obtained during dobutamine infusion was 1140 (377) mmHg/s in AAI pacing, 1458 (448) mmHg/s in the baseline OPC, and 1656 (435) mmHg/s in the dobutamine OPC (p < 0.001 for differences). The mean increase in LV dP/dTmax obtained by changing from baseline OPC to dobutamine OPC during dobutamine infusion was 197 (338) mmHg/s (13%). The QRS duration, QRS morphology, QLV and QRV intervals did not change significantly during dobutamine infusion (all P > 0.05). CONCLUSIONS:The optimal CRT pacing configuration changes during dobutamine infusion while LV and RV activation timing does not. Further studies investigating the usefulness of automated dynamic changes to CRT pacing configuration according to physiologic condition may be warranted.
journal_name
J Electrocardioljournal_title
Journal of electrocardiologyauthors
Atwater BD,Jones WS,Loring Z,Friedman DJdoi
10.1016/j.jelectrocard.2020.08.012subject
Has Abstractpub_date
2020-01-01 00:00:00pages
124-128eissn
0022-0736issn
1532-8430pii
S0022-0736(20)30532-Xjournal_volume
62pub_type
杂志文章abstract:BACKGROUND:Presence of severe autonomic failure (SAF), defined as coincidence of abnormal heart rate turbulence and abnormal deceleration capacity, identifies a group of patients with very poor prognosis among post-infarction patients with diabetes mellitus. However, factors contributing to development of SAF are entir...
journal_title:Journal of electrocardiology
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更新日期:2012-11-01 00:00:00
abstract::A prolonged QT interval is an important prognostic indicator for cardiac arrhythmias and sudden death. The conventional QT interval measurement, however, includes in its measure the cardiac depolarization (QRS) as well as the cardiac repolarization (JT) intervals. To evaluate the relative contribution of the depolariz...
journal_title:Journal of electrocardiology
pub_type: 临床试验,杂志文章
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journal_title:Journal of electrocardiology
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更新日期:2017-01-01 00:00:00
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journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2010.07.005
更新日期:2010-11-01 00:00:00
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journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/s0022-0736(81)80044-1
更新日期:1981-01-01 00:00:00
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pub_type: 杂志文章
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journal_title:Journal of electrocardiology
pub_type: 杂志文章
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journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2013.10.001
更新日期:2014-01-01 00:00:00
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journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2006.06.004
更新日期:2008-01-01 00:00:00
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journal_title:Journal of electrocardiology
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doi:10.1016/j.jelectrocard.2009.07.014
更新日期:2010-05-01 00:00:00
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journal_title:Journal of electrocardiology
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doi:10.1016/s0022-0736(87)80080-8
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journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/s0022-0736(94)80091-x
更新日期:1994-01-01 00:00:00
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pub_type: 杂志文章
doi:10.1054/jelc.2000.20299
更新日期:2000-01-01 00:00:00
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journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2009.03.011
更新日期:2009-09-01 00:00:00
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journal_title:Journal of electrocardiology
pub_type: 杂志文章,评审
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journal_title:Journal of electrocardiology
pub_type: 杂志文章,评审
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pub_type: 杂志文章
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journal_title:Journal of electrocardiology
pub_type: 杂志文章
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journal_title:Journal of electrocardiology
pub_type: 杂志文章
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更新日期:1989-07-01 00:00:00
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journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2006.05.026
更新日期:2006-10-01 00:00:00
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journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2012.04.003
更新日期:2012-07-01 00:00:00
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journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2008.07.022
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journal_title:Journal of electrocardiology
pub_type: 杂志文章,评审
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journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2006.07.008
更新日期:2007-07-01 00:00:00
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pub_type: 杂志文章
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更新日期:2016-01-01 00:00:00