Fig 1.
Normal hemodynamic response to passive head-up tilt test and nitroglycerin (woman, 32 years).
This patient is representative of lowest (reference) quartiles of both ΔSBP and ΔHR (i.e. Q1).
Fig 2.
Normal hemodynamic response to passive head-up tilt test and vasovagal reflex induced by nitroglycerine (man, 50 years).
This patient is representative of lowest (reference) quartiles of both ΔSBP and ΔHR (i.e. Q1).
Fig 3.
Pronounced orthostatic tachycardia (≈POTS) and vasovagal reflex syncope (woman, 24 years).
This patient is representative of highest quartiles of ΔHR (i.e. Q4) both after 3 min of HUT and at the maximal heart rate during HUT.
Fig 4.
Delayed orthostatic hypotension and syncope probably due to vasovagal reflex activation (woman, 53 years).
This patient is representative of highest quartile of max ΔSBP (i.e. Q4) at the minimal SBP during HUT but not after 3 min of HUT.
Fig 5.
Pronounced classical orthostatic hypotension and syncope (man, 65 years).
This patient is representative of highest quartiles of ΔSBP (i.e. Q4) both after 3 min of HUT and at the minimal SBP during HUT.
Table 1.
Clinical characteristics of study population (n = 671) including haemodynamic parameters observed during head-up tilt test.
Fig 6.
ORs log regression Q4 vs Q1 adj age sex delta SBP 3min log transformed.
Fig 7.
ORs log regression Q4 vs Q1 adj age sex delta SBP max log transformed.
Fig 8.
ORs log regression Q4 vs Q1 adj age sex delta HR 3 min log transformed.
Fig 9.
ORs log regression Q4 vs Q1 adj age sex delta HR max log transformed.