Table 1.
Supine baseline hemodynamic and cardiopulmonary data
| Healthy Volunteer | POTS Hyperventilation | Panic Disorder | |
|---|---|---|---|
| Heart rate, beats/min | 66 ± 3 | 82 ± 5* | 74 ± 5 |
| Systolic BP, mmHg | 115 ± 3 | 118 ± 2 | 114 ± 3 |
| Diastolic BP, mmHg | 60 ± 2 | 62 ± 2 | 68 ± 3 |
| MAP, mmHg | 79 ± 4 | 77 ± 4 | 81 ± 4 |
| Pulse pressure, mmHg | 54 ± 3 | 55 ± 4 | 47 ± 3 |
| Respiratory rate, breaths/min | 14 ± 1 | 15 ± 1 | 14 ± 1 |
| V̇e, l/min | 6.8 ± 0.7 | 7.4 ± 0.7 | 6.7 ± 0.7 |
| Tidal volume, liters | 0.49 ± 0.03 | 0.50 ± 0.08 | 0.51 ± 0.05 |
| ETCO2, Torr | 41.4 ± 0.6 | 38.2 ± 0.8 | 41.9 ± 0.5 |
| Cardiac output, l/min | 5.7 ± 0.4 | 5.4 ± 0.2 | 5.8 ± 0.4 |
| TPR, mmHg·l−1·min−1 | 16.3 ± 1.5 | 15.6 ± 1.5 | 15.1 ± 1.0 |
| Mean CBFv, cm/s | 72 ± 3 | 73 ± 6 | 75 ± 3 |
Values are means ± SE. BP, blood pressure; CBFv, cerebral blood flow velocity; ETCO2, end tidal carbon dioxide; MAP, mean arterial pressure; POTS, postural tachycardia syndrome; TPR, total peripheral resistance.
*
P < 0.05 difference from healthy volunteer control subject.