Concept Map: Hypertension Patient: T.J., 30-year-old African American male Presenting Symptoms: Dizziness spells, headache at the base of the skull, nocturia Diagnosis: Essential Hypertension Pathophysiology: Chronic elevation of blood pressure above 140/90 mmHg. Increased peripheral resistance due to vasoconstriction.   Increased cardiac output from the heart’s attempt to compensate. Over time, damage to blood vessels, […]