Pulse pressure and left ventricular diastolic dysfunction in hypertensive patients

Area of Science:

• Cardiology
• Hypertension Research
• Diastology

Background:

• Essential hypertension frequently leads to impaired left ventricular diastolic function.
• Left ventricular diastolic function is assessed using the E/A flow velocity index.
• Age and left ventricular hypertrophy are known factors influencing diastolic function.

Purpose of the Study:

• To investigate the relationship between 24-hour blood pressure and heart rate variations and mitral valve flow velocity (E/A).
• To identify predictors of impaired left ventricular diastolic function in hypertensive patients across different age groups and with or without left ventricular hypertrophy.

Main Methods:

• Doppler echocardiography and ambulatory blood pressure monitoring were used in 198 patients with mild to moderate essential hypertension.
• Patients were stratified by age (40-54 and 55-79 years) and presence of left ventricular hypertrophy.
• Multivariate stepwise regression analysis identified independent predictors of E/A.

Main Results:

• In the overall population, age, posterior wall thickness, and daytime mean heart rate predicted E/A.
• In young hypertensive patients with left ventricular hypertrophy, nighttime systolic blood pressure was the sole predictor of E/A.
• In elderly hypertensive patients without left ventricular hypertrophy, daytime mean heart rate and nighttime mean pulse pressure were significant predictors of E/A.

Conclusions:

• Nighttime pulse pressure is a significant independent predictor of abnormal left ventricular diastolic filling in elderly hypertensive individuals without left ventricular hypertrophy.
• This finding offers a novel clinical marker for diastolic dysfunction in a specific hypertensive subgroup.