Table 1.
Absolute Values Measurement (units) | Baseline | Δ % from Baseline | Stable Tilt | Faint | End Tilt | Early Post-Tilt | Late Post-Tilt | ||||
---|---|---|---|---|---|---|---|---|---|---|---|
Fainters | Controls | Measurement (Δ%) | Fainters | Controls | Fainters | Controls | Fainters | Controls | Fainters | Controls | |
MAP(mmHg) | 80±2 | 83±2 | MAP | 7±3 * | 0.3±1 | −49±3 ‡ | −6±3 | −9±6 | −6±2 | −1±3 | 1±2 |
SBP mmHg) | 116±3 | 122±2 | SBP | 1±2 | −3±1 | −48±3 ‡ | −9±3 | −10±4 | −7±3 | −2±2 | 1±2 |
DBP(mmHg) | 63±2 | 64±2 | DBP | 13±4 * | 2±2 | −50±3 ‡ | −3±3 | −8±6 | −6±2 | −1±2 | 0±1 |
PP(mmHg) | 53±3 | 58±2 | PP | −12±3 | −10±1 | −45±2 ‡ | −15±4 | −13±5 | −7±4 | −3±3 | −1±1 |
HR(bpm) | 68±2 | 65±2 | HR | 46±4 † | 33±2 | −15±5 ‡ | 35±4 | 20±6 | 9±3 | 7±3 | 1±2 |
CO (L/Min) | 4±0.5 | 5±0.3 | CO | 2±5 | 1±4 | −53±7‡ | −0.1±5 | 14±8 | 6±5 | 1±3 | 1±2 |
Resp. Rate (breaths*min−1) | 18±1 | 16±1 | Resp. Rate | 9±4 * | −11±7 | 30±15 * | 3±9 | 16±9 | 6±5 | 5±3 | 2±3 |
ETCO2(mmHg) | 43±1 | 44±1 | ETCO2 | −7±1 | −7±2 | −23±3 ‡ | −8±2 | −10±2 ‡ | 1±2 | 1±2 | 2±1 |
Mean CBFV(cm/sec) | 78±3 | 78±3 | Mean CBFV | −11±2 | −10±1 | −46±3 ‡ | −12±2 | −13±3 * | −2±1 | −1±2 | −1±2 |
Systolic CBFV (cm/sec) | 116±4 | 115±4 | Systolic CBFV | −11±2 | −11±1 | −11±8 | −11±2 | 14±3 † | −2±2 | 3±3 | 1±3 |
Diastolic CBFV(cm/sec) | 54±3 | 55±2 | Diastolic CBFV | −7±2 | −5±2 | −66±3 ‡ | −8±3 | −21±4 † | −8±3 | −6±4 | −3±1 |
Pulsatile CBFV(cm/sec) | 62±3 | 61±2 | Pulsatile CBFV | −15±3 | −15±2 | 38±13 † | −12±3 | 23±6 * | 4±2 | 3±2 | 1±2 |
CVRi(mmHg/cm/sec) | 1.1±0.1 | 1.2±0.1 | CVRi | −2±5 | −8±3 | −43±7‡ | −12±4 | 3±6 | −3±2 | 2±5 | 2±4 |
MAP, mean arterial pressure. SBP, systolic blood pressure. DBP, diastolic blood pressure. PP, pulse pressure. HR, heart rate. CO, cardiac output. Resp. Rate, respiratory rate. ETCO2, end-tidal CO2. CBFV, cerebral blood flow velocity. CVRi, cerebrovascular resistance index.