
Keywords: آزمایش شیب; CI; confidence interval; ECG; electrocardiogram; ENSTT; early nitrate-stimulated tilt test; NSTT; nitrate-stimulated tilt test; OR; odds ratio; PTT; passive tilt test; VVS; vasovagal syncope; s.l.; sublingual; Syncope; Tilt testing; Nitrate-stimulated til