cardiac neurosis


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car·di·ac neu·ro·sis

anxiety concerning the state of the heart, as a result of palpitation, chest pain, or other symptoms not due to heart disease; a form of hypochondriasis.
Synonym(s): cardioneurosis

orthostatic intolerance

A condition (OMIM:604715) characterised by lightheadedness, fatigue, altered mentation, syncope and tachycardia upon assuming an upright position, and markedly elevated serum norepinephrine. 

Molecular pathology
Defects in SLC6A2, which encodes a member of the sodium:neurotransmitter symporter that regulates norepinephrine homeostasis, are a cause of orthostatic intolerance.

car·di·ac neu·ro·sis

(kahr'dē-ak nūr-ō'sis)
Anxiety concerning the state of the heart, as a result of palpitation, chest pain, or other symptoms not due to heart disease; a form of hypochondriasis.
Synonym(s): cardioneurosis.

cardiac neurosis

An unjustified conviction that one is suffering from heart disease. A form of HYPOCHONDRIASIS.