These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: [Ergospirometric findings in respiration- and QT-controlled pacemakers].
    Author: Sigmund M, van Erckelens F, Reupcke C, Heiermann B, Hanrath P.
    Journal: Z Kardiol; 1994; 83 Suppl 3():145-8. PubMed ID: 7941662.
    Abstract:
    This study used ergospirometry with quantification of gas exchange parameters to analyze the beneficial effects of two sensors for rate responsive pacing: QT-interval and minute ventilation (MV). Bicycle exercise testing was performed with modulating VVIR pacing modes in random sequence. Rate responsiveness effected a mean increase of exercise tolerance of 31.1% in the QT group and 22.6% in the MV group. With both systems maximal oxygen uptake increased by 29.4% (QT) and 28.3% (MV). Oxygen consumption at the anaerobic threshold was improved by 28.3% (QT) and 32.1% (MV). The increase of cardiopulmonary parameters achieved by rate responsiveness was significant (p < 0.05) without significant difference in comparison between both groups. Despite the initially delayed rate increase at the onset of exercise mediated by the QT-interval, the programmed upper rate limit was satisfactorily attained by both principles. Thus, both sensors--minute ventilation and QT-interval--provide an adequate rate modulation in response to exercise and a marked improvement of cardiopulmonary work capacity.
    [Abstract] [Full Text] [Related] [New Search]