Cumulative Blood Pressure in Early Adulthood and Cardiac Dysfunction in Middle Age: The CARDIA Study

Area of Science:

• Cardiology
• Cardiovascular Health
• Hypertension Research

Background:

• Cumulative blood pressure (BP) exposure is a potential risk factor for myocardial dysfunction and future heart failure.
• Understanding the long-term impact of BP on cardiac function is crucial for preventative strategies.

Purpose of the Study:

• To investigate the influence of cumulative high BP exposure on left ventricular (LV) function.
• To assess cardiac deformation and diastolic function in relation to long-term BP levels during young to middle adulthood.

Main Methods:

• Utilized data from the Coronary Artery Risk Development in Young Adults (CARDIA) study.
• Measured LV function and cardiac deformation using echocardiography and speckle-tracking at year 25.
• Quantified cumulative BP exposure (mm Hg × year) and analyzed associations with LV function using regression models.

Main Results:

• Cumulative BP exposure was not associated with LV ejection fraction.
• Higher cumulative systolic blood pressure (SBP) and diastolic blood pressure (DBP) were linked to reduced longitudinal strain rate (p < 0.001).
• Elevated cumulative SBP and DBP correlated with impaired early diastolic longitudinal peak strain rate, with DBP showing a stronger association.

Conclusions:

• Sustained exposure to elevated BP from young adulthood to middle age is associated with early signs of LV systolic and diastolic dysfunction.
• These findings highlight the detrimental effects of long-term hypertension on cardiac mechanics, even before clinical manifestation of heart failure.