What condition is classified as hypertension?

Hypertension is defined as having blood pressure readings that are consistently higher than normal levels. According to guidelines established by health organizations, a diastolic pressure of 90 mmHg or higher is a key threshold for diagnosing hypertension. This is because elevated diastolic pressure indicates significant strain on the cardiovascular system, which can lead to serious health issues over time, such as heart disease and stroke.

Other conditions mentioned, such as a diastolic pressure above 80 mmHg, a systolic pressure of 130 mmHg, or normal blood pressure readings, do not meet the criteria for hypertension. The first option does not align with the established cutoff for hypertension, while the systolic pressure mentioned also falls within the range categorized as elevated blood pressure rather than hypertension. Normal blood pressure readings distinctly indicate that hypertension is not present at all. Hence, the option that states a diastolic pressure of 90 mmHg or higher is an accurate characterization of hypertension in line with clinical definitions.