Head-up tilt testing in older syncope patients: a systematic review

Area of Science:

• Cardiology
• Geriatrics
• Diagnostic Testing

Background:

• Syncope diagnosis in older adults is challenging due to unreliable medical histories.
• Head-up tilt testing (HUTT) is a potential diagnostic aid for syncope in this population.
• Systematic review to assess HUTT positivity rates and safety in elderly patients.

Purpose of the Study:

• Evaluate positivity rates and safety of HUTT in older syncope patients (≥65 years).
• Compare HUTT diagnostic yield and outcomes between older and younger individuals.
• Assess the effectiveness of different HUTT protocols (passive, isoproterenol, nitroglycerin).

Main Methods:

• Systematic review of 42 studies including 12,378 older participants.
• Searched Medline and Embase for HUTT positivity rates and diagnoses.
• Analyzed time to syncope (TtS) and adverse events (AEs); assessed risk of bias.

Main Results:

• HUTT positivity rates varied widely across protocols.
• No significant differences in positivity rates or TtS between older and younger patients.
• Nitroglycerin-HUTT yielded the most diagnoses (64.2%) with high specificity (85.5%-100%) and safety (<6% AEs).

Conclusions:

• HUTT is a safe and effective diagnostic tool for older syncope patients.
• Nitroglycerin-HUTT demonstrates the highest diagnostic yield and specificity in this population.
• Further research should explore HUTT's added value in initial syncope evaluations for the elderly.