Reproducibility of nitrate-stimulated tilt testing in patients with suspected vasovagal syncope and a healthy control group

Nitrate-stimulated tilt testing in both patients with suspected vasovagal syncope and controls has an excellent reproducibility of positive results but a moderate reproducibility of negative results. Importantly, these results are still valid at a repeat interval of 2 weeks and longer. These data suggest that in patients with suspected vasovagal syncope, a nitrate-stimulated tilt test may provide a suitable tool to evaluate the efficacy of a therapeutic approach.