Primary hypertension, also termed essential hypertension, is chronically elevated systemic arterial blood pressure for which no single identifiable secondary cause can be found. It constitutes the large majority of hypertension cases and arises from a complex interplay of genetic predisposition, advancing age, and m…
Primary hypertension, also termed essential hypertension, is chronically elevated systemic arterial blood pressure for which no single identifiable secondary cause can be found. It constitutes the large majority of hypertension cases and arises from a complex interplay of genetic predisposition, advancing age, and modifiable lifestyle and environmental influences. Its pathophysiology is multifactorial, involving increased peripheral vascular resistance, heightened sympathetic nervous activity, dysregulation of the renin-angiotensin-aldosterone system, altered renal sodium handling, and endothelial and arterial structural changes that raise vascular stiffness. Major risk factors include obesity, physical inactivity, excessive sodium intake, and the clustering of metabolic abnormalities seen in the metabolic syndrome, while environmental conditions such as exposure to hypoxia at altitude can further influence blood-pressure regulation. Sustained pressure elevation drives progressive vascular and target-organ damage; subclinical injury can be detected as increased carotid intima-media thickness, and continued exposure predisposes to cardiovascular disease, stroke, and renal impairment, with severe acute elevations presenting as hypertensive crisis. Management combines lifestyle modification—weight reduction, dietary change, and structured physical activity drawn from exercise and sports medicine—with antihypertensive pharmacotherapy, including calcium-channel blockers and rational combination regimens. Coordinated, integrated clinical care is emphasized to address the persistent problem of inadequately controlled blood pressure across populations.
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