What defines hypertension in terms of blood pressure readings?

Hypertension is defined by specific blood pressure readings that determine the classification of blood pressure levels in adults. The correct answer refers to a systolic pressure above 140 mm Hg or a diastolic pressure above 90 mm Hg, which aligns with standards established by organizations such as the American Heart Association. This classification reflects a threshold where the risk of cardiovascular disease begins to significantly increase, and it is utilized as a guideline for diagnosing and managing hypertension in clinical practices.

Understanding these specific thresholds helps in the effective screening and treatment of hypertension, enabling healthcare providers to initiate interventions before more severe health complications arise. The other options present different thresholds, which may not accurately reflect the current guidelines for hypertension diagnosis, thereby lacking clinical relevance in this context. This knowledge is crucial for recognizing and managing a condition that affects a substantial portion of the population.