Related Experiment Videos
Single-stage adenosine tilt testing in patients with unexplained syncope.
Suneet Mittal1, Kenneth M Stein, Steven M Markowitz
1Department of Medicine, Division of Cardiology, Cornell University Medical Center, New York, New York 10021, USA. sum2010@med.cornell.edu
Journal of Cardiovascular Electrophysiology
|June 4, 2004
Summary
The single-stage adenosine tilt test is highly specific for diagnosing unexplained syncope. Its diagnostic yield is highest in patients 40 years or younger, suggesting its primary clinical utility in this age group.
Area of Science:
- Cardiology
- Diagnostic Testing
- Nephrology
Background:
- Previous research indicated a 3-minute single-stage adenosine tilt test offers diagnostic yield comparable to longer two-stage protocols.
- Unexplained syncope diagnosis remains a clinical challenge, necessitating efficient and accurate testing methods.
Purpose of the Study:
- To prospectively evaluate the specificity of the single-stage adenosine tilt test.
- To determine the predictors of a positive test response in patients with unexplained syncope.
- To define the clinical utility of adenosine tilt testing across different age groups.
Main Methods:
- Adenosine tilt tests were performed on 129 patients diagnosed with unexplained syncope.
- Test specificity was assessed using 30 healthy control subjects.
- Data analysis focused on diagnostic yield and its correlation with patient age.
Main Results:
- The single-stage adenosine tilt test demonstrated high specificity (100%).
- Overall diagnostic yield was 18%, but significantly influenced by age.
- Patients ≤40 years showed a positive test rate of 41%, compared to 15% in those 41-64 years and 5% in those ≥65 years.
Conclusions:
- Single-stage adenosine tilt testing is supported for patients ≤40 years due to maximal diagnostic yield and short test duration (≤3 minutes).
- The low diagnostic yield in patients >40 years suggests limited clinical utility for this specific protocol in older demographics.