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Related Experiment Video

Updated: Jun 29, 2025

Tilt Testing with Combined Lower Body Negative Pressure: a "Gold Standard" for Measuring Orthostatic Tolerance

Tilt Testing with Combined Lower Body Negative Pressure: a "Gold Standard" for Measuring Orthostatic Tolerance

Published on: March 21, 2013

Relationship between syncopal symptoms and head-up tilt test modes.

Shuo Wang^1,2, Yali Peng³, Yuwen Wang²

¹Department of Pediatrics, Xiangya Hospital, Central South University, Changsha, China.

Cardiology in the Young

|April 5, 2024

Summary

This summary is machine-generated.

In pediatric vasovagal syncope, previous syncopal episodes significantly increase the likelihood of a positive basic head-up tilt test (BHUT) compared to the sublingual nitroglycerine head-up tilt test (SNHUT). This finding aids in selecting the appropriate diagnostic method.

Keywords:

children head-up tilt test risk factor syncope

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Area of Science:

Pediatrics
Cardiology
Neurology

Background:

Vasovagal syncope is a common cause of syncope in children.
The head-up tilt test (HUTT) is a key diagnostic tool for pediatric vasovagal syncope.
Different HUTT protocols exist, including basic HUTT (BHUT) and sublingual nitroglycerine HUTT (SNHUT).

Purpose of the Study:

To investigate the relationship between syncopal symptoms and HUTT modes in pediatric vasovagal syncope.
To compare the diagnostic yield of BHUT versus SNHUT in children with vasovagal syncope.

Main Methods:

Retrospective analysis of clinical data from 2513 children (aged 3-18 years) diagnosed with vasovagal syncope between 2001 and 2021.
Patients were categorized into BHUT (596) and SNHUT (1917) groups based on their positive HUTT mode.
Statistical analysis included univariate and multivariate analyses to identify risk factors for BHUT positivity.

Main Results:

Baseline characteristics such as age, heart rate, and blood pressure were higher in the BHUT group.
Univariate analysis identified age, height, weight, heart rate, blood pressure, and syncope as potential risk factors for BHUT positivity.
Multivariate analysis confirmed syncope as an independent risk factor for BHUT positivity, increasing the likelihood by 121% compared to pre-syncope.

Conclusions:

The probability of a positive BHUT is significantly higher than SNHUT in pediatric patients with a history of syncopal episodes.
This suggests that BHUT may be more sensitive in diagnosing vasovagal syncope in children who have previously experienced syncope.