Isolated office hypertension: a prehypertensive state?

Area of Science:

• Cardiology
• Hypertension Research
• Clinical Medicine

Background:

• Isolated office hypertension (IOH) is common, characterized by high readings in clinic but normal readings outside.
• The long-term prognosis of IOH, specifically its potential to evolve into sustained ambulatory hypertension, remains unclear.
• Previous studies lack long-term ambulatory blood pressure monitoring data for IOH patients.

Purpose of the Study:

• To determine if isolated office hypertension is a transient phase or a precursor to sustained ambulatory hypertension.
• To evaluate the long-term changes in both office and ambulatory blood pressure in patients with IOH.
• To assess whether patients with IOH should be classified as normotensive or hypertensive.

Main Methods:

• Longitudinal study of 81 patients diagnosed with isolated office hypertension between 1982 and 1988.
• Regular monitoring of both office blood pressure and 12-hour daytime ambulatory blood pressure.
• Follow-up period of 5-6 years to track blood pressure evolution.

Main Results:

• A significant majority (60/81) of patients with IOH developed ambulatory hypertension (mean 12h daytime BP > 140/90 mmHg) within 5-6 years.
• Office blood pressure readings during follow-up showed a decreasing trend, failing to predict the development of ambulatory hypertension.
• The progression to sustained hypertension was evident in ambulatory readings, not office readings.

Conclusions:

• Patients with isolated office hypertension are not truly normotensive and require vigilant medical follow-up.
• Office blood pressure measurements alone are insufficient for predicting the long-term outcome of isolated office hypertension.
• Ambulatory blood pressure monitoring is crucial for identifying the progression of IOH to sustained hypertension.