Blood pressure responses to stress: Relation to left ventricular structure and function

Area of Science:

• Cardiology
• Physiology
• Biomedical Engineering

Background:

• Elevated blood pressure is a risk factor for cardiovascular disease.
• Left ventricular structure and diastolic function are key indicators of cardiac health.
• Understanding the impact of different blood pressure measures on cardiac structure is crucial.

Purpose of the Study:

• To investigate the relationship between various blood pressure measurements (resting, stress-induced, and workplace) and left ventricular structure and diastolic filling in healthy young adults.
• To identify which blood pressure measure is the strongest predictor of left ventricular characteristics.

Main Methods:

• 133 healthy young adults underwent resting blood pressure measurement, standardized stressor tests (reaction time, forehead compressor), and 24-hour ambulatory blood pressure monitoring.
• Left ventricular structure (mass, relative wall thickness) and diastolic filling (peak filling velocity) were assessed using echocardiography.

Main Results:

• Systolic blood pressure during the compressor test best predicted indexed left ventricular mass.
• Average workplace systolic blood pressure was most closely related to relative wall thickness, independent of resting blood pressure.
• Peak filling velocity showed inverse correlations with stress-induced systolic pressures, though not statistically significant after adjustments.

Conclusions:

• Blood pressure responses during standardized stressors and typical workdays are associated with left ventricular structural characteristics.
• Workplace blood pressure is a significant predictor of left ventricular relative wall thickness.
• These findings highlight the importance of considering stress-related blood pressure changes in cardiovascular health assessments.