Key result
The optimal atrioventricular delay for maximal cardiac output strongly correlated with the optimal delay predicted from the maximum QT interval (r=0.85, P<0.001).
Why the study?
Can the optimal AV delay for maximal cardiac output be predicted from the QT interval in patients with implanted DDD pacemakers?
Population
12 patients (aged 71+/-12 SD years) with complete or high degree AV block and implanted DDD pacemakers.
Comparison
Stepwise prolongation of AV delay by 30 ms… vs Different AV delay settings within the same…
Design
Other
Authors
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May enable noninvasive AV optimization in DDD-paced patients; leaves open validation in larger prospective trials.
Can the optimal AV delay for maximal cardiac output be predicted from the QT interval in patients with implanted DDD pacemakers?
Effect estimate: r=0.85
p-value: p=<0.001
The optimal AV delay for maximizing cardiac output in patients with DDD pacemakers can be predicted by monitoring the QT interval.
Toshiyuki Ishikawa (1999) studied Complete or high degree AV block with implanted DDD pacemakers (n=12). Stepwise prolongation of atrioventricular (AV) delay vs. Different AV delays was evaluated on Correlation between optimal AV delay for maximal cardiac output and optimal AV delay predicted from maximum QT interval (r=0.85, p=<0.001). The optimal atrioventricular delay for maximal cardiac output strongly correlated with the optimal delay predicted from the maximum QT interval (r=0.85, P<0.001).
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