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[Cardiovascular abnormalities as a cause of hypertension]
Insights
Cardiovascular abnormalities contribute to hypertension pathogenesis. Imbalances in vasoconstrictor and vasodilator neurohumoral factors, affecting cardiac output and peripheral resistance, are key in hypertension development.
Area of Science:
- Cardiovascular Physiology
- Hypertension Pathogenesis
- Neurohumoral Regulation
Context:
- Hypertension involves complex interactions affecting blood pressure regulation.
- Both in vitro and in vivo studies investigate physiological, pharmacological, and biochemical factors.
- Elevated blood pressure results from increased cardiac output and/or peripheral resistance.
Purpose:
- To review evidence linking cardiovascular abnormalities to hypertension.
- To explore the role of neurohumoral factors in blood pressure regulation.
- To elucidate the interplay between vasoconstrictor and vasodilator substances.
Summary:
- Hypertension pathogenesis involves cardiovascular abnormalities affecting cardiac output and peripheral resistance.
- Neurohumoral factors play a critical role, with increased vasoconstrictors (catecholamines, angiotensin II, endothelin-1) and decreased vasodilators (natriuretic peptides, adrenomedulin).
- Vasoconstrictors promote vascular smooth muscle cell (VSMC) proliferation and contraction, while vasodilators inhibit these processes.
Impact:
- Highlights the multifaceted nature of hypertension, involving cardiovascular and neurohumoral systems.
- Provides insights into potential therapeutic targets for managing hypertension.
- Emphasizes the dynamic balance between opposing neurohumoral factors in maintaining cardiovascular homeostasis.
Abstract:
This review is an attempt to highlight evidence that may implicate the cardiovascular abnormalities in the pathogenesis of hypertension. Many physiological, pharmacological, and biochemical studies have been conducted in in vitro and in vivo systems. Since blood pressure can rise in response to an increase in cardiac output and/or a rise in peripheral resistance, abnormalities may be present in one or more of the multiple factors that affect these two parameters in hypertension. These multiple factors include various neurohumoral factors. Increased levels of various vasoconstrictor neurohumoral factors have been found in patients with hypertension. Vasoconstrictor neurohumoral factors such as catecholamines, angiotensin II, and endothelin-1 induce vascular smooth muscle cells(VSMCs) proliferation and contraction. On the other hand, vasodilator neurohumoral factors such as natriuretic peptides and adrenomedulin inhibit VSMCs proliferation. Both neurohumoral factors mutually interact and develop hypertension.