Related Experiment Videos
Comparing two different protocols for tilt table testing: sublingual glyceryl trinitrate versus isoprenaline infusion
1Cardiology Department, Shahid Rajaii Heart Hospital, Iran University of Medical Sciences, Vali-Asr Avenue, Tehran, Iran. oraii@rhc.ac.ir
Heart (British Cardiac Society)
|May 25, 1999
Summary
Sublingual glyceryl trinitrate tilt testing offers a safe and effective alternative for diagnosing unexplained syncope. This method provides comparable diagnostic value to isoprenaline infusion and can be used complementarily.
Area of Science:
- Cardiology
- Nephrology
- Neurology
Background:
- Unexplained syncope poses a diagnostic challenge.
- Accurate diagnosis is crucial for effective patient management and risk stratification.
Purpose of the Study:
- To evaluate the diagnostic utility and safety of sublingual glyceryl trinitrate (GTN) tilt testing.
- To compare GTN tilt testing with isoprenaline infusion tilt testing in patients with unexplained syncope.
Main Methods:
- A randomized crossover design was employed, comparing GTN and isoprenaline tilt tests on separate days.
- The study included 65 patients with unexplained syncope and 20 healthy controls.
Main Results:
- Both GTN and isoprenaline tilt tests demonstrated diagnostic value, with sensitivities of 55% and 58%, respectively.
- GTN tilt testing showed slightly higher specificity (94.7%) compared to isoprenaline (89.4%).
- Sequential use of both tests increased sensitivity to 84% with minimal specificity reduction, and GTN had fewer side effects.
Conclusions:
- Sublingual glyceryl trinitrate tilt testing is a safe and effective alternative to isoprenaline infusion for diagnosing syncope.
- GTN tilt testing can be utilized as a complementary diagnostic tool in syncope workup.