Episodic catatonia, hypertension, and tachycardia: elevated plasma catecholamines
Neurology
|July 1, 1985
Summary
Episodes of catatonia, hypertension, and tachycardia in a woman were linked to central sympathetic nervous system activation. This autonomic dysfunction involved extremely high epinephrine and norepinephrine levels during episodes.
Area of Science:
- Neuroscience
- Autonomic Nervous System Research
- Endocrinology
Background:
- Autonomic dysfunction can manifest in various clinical symptoms, including cardiovascular and behavioral changes.
- Understanding the central mechanisms of sympathetic nervous system activation is crucial for diagnosing and managing related disorders.
Observation:
- A 34-year-old woman experienced recurrent episodes characterized by catatonia, hypertension, and tachycardia.
- During symptomatic episodes, extremely elevated levels of epinephrine and norepinephrine were observed.
Findings:
- Normal catecholamine clearance and normal platelet alpha 2-adrenergic receptors suggest the issue is not peripheral clearance or receptor abnormality.
- Phenylephrine infusion test results indicate central sympathetic nervous system overactivity as the likely cause of the observed episodes.
Implications:
- These findings suggest a potential central regulatory disorder of the sympathetic nervous system.
- Further research into central autonomic control mechanisms may reveal new diagnostic markers and therapeutic targets for similar conditions.
More Related Videos
Related Concept Videos
01:24Mania and Antimanic Drugs: Overview
Mania, a psychological condition characterized by elevated mood, increased energy, and reduced sleep need, is part of the bipolar disorder cycle. The exact cause of mania isn't entirely known, but it is thought to be a combination of genetic, environmental, and neurological factors. Bipolar disorder involves alternating manic and depressive episodes. Mood stabilizers like lithium, antipsychotics, and anticonvulsants help manage these episodes. Lithium carbonate is particularly effective as a...
01:29Dysrhythmias III: Characteristics of Dysrhythmias
Dysrhythmias, also known as arrhythmias, are irregular heart rhythms that result from abnormal electrical activity in the heart, affecting its ability to circulate blood efficiently. Tachyarrhythmias, a subset of dysrhythmias, are characterized by abnormally fast heart rates exceeding 100 beats per minute. Here are some types of tachyarrhythmias with their distinct ECG features:Sinus Tachycardia:Sinus tachycardia presents a regular heart rhythm with an increased rate of 101-180 beats per minute.
01:30Hypertension III: Clinical Manifestations and Diagnostic Studies
Hypertension is asymptomatic and also referred to as the "silent killer" until it progresses to a severe stage or causes target organ disease. Patients may experience symptoms stemming from the strain on blood vessels and tissues in various organs or the heart's increased workload.Physical exams might show no abnormalities other than high blood pressure. Signs of vascular damage, when present, correspond to the organs supplied by the affected vessels, leading to target organ damage. For...
01:25ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias
Arrhythmia is a condition characterized by an irregular heart rhythm, with ECG changes that differ based on its origin and nature. The types of arrhythmias discussed below include atrial, junctional, and ventricular arrhythmias.Atrial ArrhythmiasPremature Atrial Complexes (PACs): PACs are early atrial beats caused by stress, caffeine, alcohol, electrolyte imbalances, hypoxia, hyperthyroidism, or certain medications (e.g., bronchodilators and decongestants). The ECG shows early P waves with an...
01:26Cushing Syndrome I: Introduction
Cushing syndrome refers to the collection of clinical manifestations that arise when tissues are exposed to excessive amounts of cortisol or cortisol-like medications over an extended period. Cortisol, a glucocorticoid produced by the adrenal cortex, regulates metabolism, immune responses, and the body’s adaptation to stress. When its concentration remains chronically elevated, these physiological pathways become dysregulated, resulting in the characteristic features of the syndrome.Exogenous...
01:19Cushing Syndrome II: Pathophysiology
Cortisol production is normally governed by the hypothalamic–pituitary–adrenal (HPA) axis, which maintains hormonal balance through tightly regulated feedback mechanisms. Disruption of this regulatory system is central to the development of Cushing syndrome, whether the excess cortisol originates from external medications or internal pathology. Persistent cortisol elevation alters metabolism, immune function, and endocrine signaling, producing the characteristic clinical features of the...