July 15, 1997Circulation
Prediction of Head-Up Tilt Test Result by Analysis of Early Heart Rate Variations
Why the study?
Does early heart rate variation analysis predict a negative head-up tilt test result in patients with unexplained syncope?
Population
219 patients with no drug use and no illnesses other than recurrent unexplained syncope.
Design
Cohort
Authors
Discussion
Loading...
Member takes
Implication
May support abbreviated tilt testing in unexplained syncope; hypothesis-generating and requires prospective validation before practice change.
Structured PICO
Does early heart rate variation analysis predict a negative head-up tilt test result in patients with unexplained syncope?
P
Population
219 patients (110 in initial study, 109 in validation study) with no drug use and no illnesses other than recurrent unexplained syncope.
I
Intervention
Analysis of early heart rate variations (early sustained increase in heart rate <= 18 bpm during the first 6 minutes of upright tilting at a 60 degree angle).
O
Outcome
Prediction of negative head-up tilt test result.surrogate
An early sustained increase in heart rate <= 18 bpm during the first 6 minutes of a head-up tilt test accurately predicts a negative result, potentially allowing for a reduction in test duration.
Cite This Study
Mallat et al. (1997) studied this question.