Key result
Head-up tilt test positivity shows no difference between bifascicular block patients with and without unexplained syncope.
Why the study?
Does the head-up tilt test accurately diagnose the cause of syncope in patients with bifascicular block?
Population
50 subjects with bifascicular block, comprising 25 patients with unexplained syncope after extensive…
Comparison
Head-up tilt test vs Control group of 25 subjects with bifascicular…
Design
Case-control
Follow-up
32 months
Authors
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Tilt testing lacks specificity in bifascicular block; leaves open its diagnostic utility and should not yet change practice.
Case-Control (n=50)
Does the head-up tilt test accurately diagnose the cause of syncope in patients with bifascicular block?
Absolute Event Rate: 28% vs 32%
p-value: p=NS
The head-up tilt test lacks specificity for diagnosing the cause of syncope in patients with bifascicular block, as positive rates are similar to asymptomatic controls.
Englund et al. (1997) conducted a case-control in Bifascicular block with unexplained syncope (n=50). Head-up tilt test vs. Subjects with bifascicular block without syncope was evaluated on Positive head-up tilt test (p=NS). A positive head-up tilt test was found in 28% of patients with bifascicular block and unexplained syncope compared to 32% of matched controls without syncope (P = NS).
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