Magnitude, reproducibility, and components of the pressor response to the clinic

Area of Science:

• Cardiology
• Hypertension Research
• Clinical Pharmacology

Background:

• The 'white coat effect' is a phenomenon where blood pressure is higher in a clinical setting than during ambulatory monitoring.
• Understanding the magnitude and consistency of this effect is crucial for accurate hypertension management.

Purpose of the Study:

• To quantify the pressor response to clinic visits using ambulatory blood pressure monitoring.
• To assess if this effect persists despite antihypertensive treatment.

Main Methods:

• Ambulatory blood pressure monitoring was used in 51 hypertensive patients on placebo or various antihypertensive drugs.
• Clinic-related blood pressure readings were compared with clinic-unrelated readings throughout the day.
• Repeat studies were conducted over 2-24 months to assess the consistency of the pressor response.

Main Results:

• Clinic-related systolic, diastolic, and pulse pressures were significantly higher than clinic-unrelated pressures, both on placebo and during treatment.
• The pressor response was observed even during the initial transit to and from the clinic.
• The average pressor response remained consistent in repeat studies, but individual patient responses varied.

Conclusions:

• The white coat effect significantly impacts blood pressure measurements in hypertensive patients.
• This phenomenon is present regardless of antihypertensive medication, highlighting the importance of ambulatory monitoring for diagnosis and management.
• While the overall pressor response is consistent, individual patient variability suggests a need for personalized monitoring strategies.