Endocrine, nutritional, and metabolic diseases (E00-E90).
- Hypoaldosteronism – decreased secretion of aldosterone, a hormone from the adrenal cortex (symptoms: Hyponatremia (sodium deficiency), hyperkalemia (potassium excess), exsiccosis, collapse).
- Hypoglycemia (hypoglycemia).
- Hyponatremia – decreased sodium content in the blood.
- Hypothyroidism (underactive thyroid gland)
- Hypovolemia – too little blood in the vascular system.
- Insufficiency of the anterior pituitary (front lobe of the pituitary gland).
- Adrenocortical insufficiency (NNR insufficiency; adrenocortical insufficiency).
Cardiovascular system (I00-I99).
- Aortic valve stenosis – narrowing of the heart valve that lies between the left ventricle (chamber) and the aorta (main artery).
- Essential hypotension – drop in blood pressure due to a regulatory disorder of the circulatory system; harmless.
- Heart failure (cardiac insufficiency)
- Cardiac arrhythmias
- Orthostatic hypotension due to varicosis (varicose veins) or in postthrombotic syndrome (condition after thrombosis).
- Pericarditis (inflammation of the pericardium)
- Postprandial hypotension (systolic blood pressure drop of at least 20 mmHg for a period of at least 30 minutes within two hours of food intake; elderly survivors after intensive care unit stay)
- Pulmonary hypertension – high blood pressure in the pulmonary circulation.
Psyche – nervous system (F00-F99; G00-G99)
- Polyneuropathy – disease of the peripheral nervous system. Depending on the cause in question, motor, sensory or even autonomic nerves may be affected in a focal manner.
- Shy-Drager syndrome – form of multisystem atrophy; this is a neurological disease similar to Parkinson’s disease.
Causes (external) of morbidity and mortality (V01-Y84).
- Hypovolemia – decrease in the amount of blood in the systemic circulation.
Further
- Bradbury-Egglestone syndrome – rare disorder leading to orthostatic hypotension due to isolated autonomic insufficiency.
- Immobilization
- Cardiovascular diabetic autonomic neuropathy – a common complication of diabetes associated with an approximately threefold mortality risk (symptoms: marked orthostatic hypotension, increased intraoperative lability; may potentially lead to clustered incidence of silent or asymptomatic myocardial ischemia or infarction, respectively)
Medications
- See “Causes” under medications
