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• W2000368249 abstract "Despite higher costs, expenditure, and the necessity of repeatedly reprogramming of dual chamber pacemakers, they are increasingly implanted to achieve an optimal work capacity. The influence of an individually programmed atrioventricular (AV) delay hetween 100–250 msec on physical work capacity in 12 patients (68 ± 16 years) with dual chamher pacemakers implanted for high degree AV block was studied. During radionuclide ventriculography at rest the “optimal AV delay” with the maximal achieved left ventricular ejection fraction and the “most unfavorable AV delay” with the least achieved ejection fraction were determined. The ejection fraction at rest with the “optimal AV delay” was 5t ±14% and with the “most unfavorable AV delay” 45 ± 15% (P < 0.001). In random order each patient was assigned to either AV delay and a spiroergometry was performed to determine maximum oxygen uptake (max VO2). which correlates best with work capacity, at a respiratory quotient of 1.1. The results show neither a difference in maximum oxygen uptake (1,262 ± 446 mUmin with the optimal AV delay, 1,248 ± 400 mL/min with the most unfavorable AV delay, respectively) nor in heart rate, blood pressure, exercise duration, maximal workload, and minute ventilation. Thus, an individually programmed AV delay affects left ventricular ejection fraction at rest. In contrast, an individually programmed A V delay has no influence on physical work capacity in patients with a dual chamber pacemaker." @default.
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• W2000368249 date "1994-01-01" @default.
• W2000368249 modified "2023-09-23" @default.
• W2000368249 title "Importance of an Individually Programmed Atrioventricular Delay at Rest and on Work Capacity in Patients with Dual Chamber Pacemakers" @default.
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• W2000368249 doi "https://doi.org/10.1111/j.1540-8159.1994.tb01349.x" @default.
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