Why study sympathetic nervous system?
M Sinski1, J Lewandowski, P Abramczyk
1Department of Internal Diseases, Hypertension and Vascular Disease, Warsaw Medical University, Warsaw, Poland.
Insights
The sympathetic nervous system (SNS) significantly impacts cardiovascular health, influencing conditions like hypertension and heart failure. Heart rate variability (HRV) and baroreflex sensitivity (BRS) are key diagnostic tools for assessing SNS activity in clinical practice.
Area of Science:
- Cardiology
- Physiology
- Neuroscience
Background:
- Cardiovascular diseases remain leading causes of global morbidity and mortality.
- Despite advances in diagnosis and therapy, understanding cardiovascular pathophysiology requires further investigation.
- The sympathetic nervous system (SNS) is crucial in regulating cardiovascular function in both health and disease.
Purpose of the Study:
- To highlight the central role of the sympathetic nervous system (SNS) in cardiovascular regulation.
- To review methods for assessing sympathetic activity and its impact on cardiovascular disorders.
- To emphasize the clinical utility of specific SNS assessment tools.
Main Methods:
- Microneurography
- Direct catecholamine measurements
- Heart rate variability (HRV) analysis
- Baroreflex sensitivity (BRS) assessment
Main Results:
- The SNS is implicated in the pathogenesis of hypertension, coronary artery disease, and heart failure.
- Various methods exist to study sympathetic activity, including HRV and BRS.
- While not all methods are routine, HRV and BRS are recognized diagnostic tools in clinical guidelines.
Conclusions:
- Sympathetic nervous system activity is a critical factor in cardiovascular health and disease.
- Heart rate variability and baroreflex sensitivity are valuable clinical tools for assessing SNS function.
- Further integration of these methods can improve cardiovascular disease management.
Abstract:
Cardiovascular diseases are the most frequent causes of morbidity and mortality around the world. However, during last decades, an improvement was made in diagnosis and therapy of cardiovascular diseases, there was still a need for better understanding of their pathophysiology. Among neurohormonal systems, SNS plays a central role in cardiovascular regulation in both health and disease. Involvement of SNS in pathogenesis of hypertension, coronary artery disease or heart failure is well known and proved. Methods such as microneurography, direct catecholamine measurements, heart rate variability or baroreflex sensitivity assessment allowed studying sympathetic activity and its influence on cardiovascular disorders. Although introduced into scientific practice methods of SNS evaluation are not commonly used in the clinic. However, two of the methods: analysis of heart rate variability (HRV) and baroreflex sensitivity (BRS) were recommended as the diagnostic tools and can be found in clinical guidelines as basic assessment methods.
Related Concept Videos
01:25The Sympathetic Nervous System
01:16Sympathetic Activation
01:31Sympathetic Signaling
Sympathetic preganglionic fibers release the neurotransmitter acetylcholine (ACh) onto the ganglionic neurons in the...
01:26Autonomic Nervous System: Overview
01:19Sympathetic Division of the ANS
Originating in the thoracic and lumbar spinal cord segments, the preganglionic fibers of the sympathetic division exit the spinal cord through the white ramus communicans. They then enter the sympathetic...
01:22Autonomic Nervous System
The ANS comprises two main divisions: the sympathetic and parasympathetic divisions. These divisions function antagonistically to maintain a dynamic...