Asympathicotonic—autonomic dysfunction; characterized by absent tachycardia |
Primary dysautonomias |
Secondary dysautonomias |
Sympathetic inhibiting drugs (see Table 76.7) |
Sympathicotonic—no autonomic dysfunction; characterized by tachycardia |
Volume depletion |
Addison's disease |
Dehydration |
Hemorrhage |
Vascular insufficiency |
Parade fainting |
Pregnancy |
Thermodilation |
Varicose veins |
Deconditioning |
Loss of gravity forces |
Postinfectious |
Prolonged bed rest |
Drug induced |
Alcohol vasodilation |
Diuretics |
Nitrates |
Potassium depletion |
Vasovagal reaction |