What stage of hypertension is a blood pressure (BP) reading of 148/59 considered?

Blood Pressure Classification of 148/59

A blood pressure reading of 148/59 mmHg is classified as Stage 2 Hypertension according to the 2017 ACC/AHA guidelines. 1, 2, 3

Classification Based on Current Guidelines

• According to the 2017 ACC/AHA guidelines, blood pressure is categorized into four levels: normal (<120/<80 mmHg), elevated (120-129/<80 mmHg), stage 1 hypertension (130-139/80-89 mmHg), and stage 2 hypertension (≥140/≥90 mmHg) 1, 2
• When systolic and diastolic blood pressure fall into different categories, the higher category should be used for classification 1, 3
• With a systolic blood pressure of 148 mmHg, this reading falls into the stage 2 hypertension category, regardless of the diastolic value 3
• The diastolic reading of 59 mmHg is below the normal range, indicating isolated systolic hypertension 4

Isolated Systolic Hypertension Considerations

• Isolated systolic hypertension is defined as elevated systolic blood pressure (≥140 mmHg) with normal or low diastolic blood pressure (<90 mmHg) 4
• The combination of elevated systolic pressure with low diastolic pressure (60-70 mmHg) should be considered an additional cardiovascular risk factor 4
• This pattern is particularly common in elderly patients and carries significant cardiovascular risk 5
• The wide pulse pressure (difference between systolic and diastolic readings) of 89 mmHg in this case may indicate decreased arterial compliance and increased cardiovascular risk 4

Clinical Implications

• Stage 2 hypertension is associated with a significantly increased risk of cardiovascular disease events, stroke, renal disease, and death compared to normal blood pressure 6
• The risk of cardiovascular events is 2.4 times higher in individuals with stage 2 hypertension compared to those with normal blood pressure 7
• Even with isolated systolic hypertension, the risk for stroke and other cardiovascular events remains substantially elevated 5, 8
• Progression from stage 1 to stage 2 hypertension is associated with a 156% increase in 10-year cardiovascular risk and a 129% increase in lifetime risk 9

Management Considerations

• Stage 2 hypertension typically requires both lifestyle modifications and pharmacological treatment 1, 3
• The low diastolic pressure (59 mmHg) requires careful consideration when selecting antihypertensive medications to avoid further lowering of diastolic pressure, which could compromise coronary perfusion 4
• For isolated systolic hypertension, diuretics are often recommended as initial therapy, with long-acting dihydropyridine calcium channel blockers as an alternative if diuretics are ineffective or not tolerated 5
• Aggressive rapid lowering of blood pressure should be avoided in asymptomatic patients, with gradual reduction over several days to weeks being the preferred approach 6

Monitoring and Follow-up

• Regular monitoring of blood pressure is essential for patients with stage 2 hypertension 3
• Assessment for target organ damage should be considered, including evaluation for left ventricular hypertrophy, renal function, and retinal changes 10, 3
• The combination of high systolic with low diastolic pressure warrants careful monitoring for symptoms of hypoperfusion when initiating or adjusting antihypertensive therapy 4