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Unveiling the role of the venous system in arterial hypertension: A computational study
Eleuterio F Toro1, Lucas O Müller2, Tonja W Emans3
1Laboratory of Applied Mathematics, Department of Civil, Environmental and Mechanical Engineering, University of Trento, Trento, Italy.
Insights
Reduced venous compliance significantly impacts arterial pressure, emerging as a key factor in hypertension beyond peripheral resistance. This finding suggests the venous system as a potential new target for blood pressure management.
Area of Science:
- Cardiovascular Physiology
- Mathematical Modeling
- Hypertension Pathophysiology
Background:
- Arterial hypertension is a widespread condition and a significant risk factor for cardiovascular and neurological diseases.
- Current medical treatments often fail to adequately control blood pressure in many patients, indicating incomplete understanding of hypertension's underlying mechanisms.
- Gaps in knowledge necessitate advanced methods to explore hypertension's complex pathophysiology.
Purpose of the Study:
- To quantify the contributions of different cardiovascular compartments to the development of arterial hypertension using a mathematical model.
- To assess the influence of uncertainty in modeling assumptions on hypertension outcomes through stochastic simulations.
- To identify key determinants of arterial pressure and their relative importance in hypertensive states.
Main Methods:
- Development and application of a closed-loop mathematical model simulating the entire human circulatory system.
- Incorporation of stochastic modeling techniques to account for parameter variability and uncertainty.
- Simulation of adaptive responses within the cardiovascular system under hypertensive conditions.
Main Results:
- Mathematical modeling identified reduced venous vascular compliance as the second most influential factor in increasing arterial pressure, following increased peripheral resistance.
- Stochastic modeling confirmed the significant impact of venous compliance on arterial pressure regulation.
- The model demonstrated that reduced venous compliance, in isolation, could induce a hypertensive state.
Conclusions:
- Venous vascular compliance plays a critical, often underestimated, role in the regulation of arterial pressure.
- The venous system represents a promising novel therapeutic target for managing and treating arterial hypertension.
- Further research into modulating venous compliance could lead to new strategies for blood pressure control.
Abstract:
Arterial hypertension is a prevalent condition and a major risk factor for cardiovascular and neurological diseases. Notably, medical treatment fails to control blood pressure in a large proportion of diagnosed subjects, highlighting gaps in our understanding of hypertension's pathophysiology. Using a mathematical model of the human cardiovascular system, we quantify the contributions of various cardiovascular compartments to the hypertensive state. The impact of uncertainty in modelling assumptions is assessed through stochastic modelling. Our results show that reduced venous vascular compliance significantly increases arterial pressure, making it the second most influential factor in determining hypertension, after increased peripheral resistance. KEY POINTS: We used a closed-loop mathematical model of the full human circulation to simulate adaptation to hypertension, including stochastic variation in parameters. The model quantifies the relative importance of different cardiovascular parameters in determining arterial pressure. Venous compliance emerged as the second most influential determinant of arterial pressure, after systemic resistance. Reduced venous compliance alone was sufficient to cause a hypertensive state in the model. These findings highlight the potential of the venous system as a novel therapeutic target for blood pressure regulation.
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