The association between 24-h blood pressure patterns and left ventricular mechanics

Area of Science:

• Cardiology
• Hypertension Research
• Echocardiography

Background:

• Hypertension is a major risk factor for cardiovascular disease.
• Blood pressure (BP) patterns, such as dipping and nondipping, can influence cardiovascular outcomes.
• Understanding left ventricular (LV) mechanics in relation to BP patterns is crucial for risk stratification.

Purpose of the Study:

• To investigate left ventricular (LV) mechanics in newly diagnosed hypertensive patients.
• To compare LV mechanics across different 24-hour blood pressure (BP) patterns: dipping, nondipping, extreme dipping, and reverse dipping.

Main Methods:

• Cross-sectional study of 209 hypertensive patients.
• Utilized 24-hour ambulatory BP monitoring.
• Conducted comprehensive two-dimensional echocardiography with multilayer strain analysis.

Main Results:

• Night-time BP increased progressively from extreme dippers to reverse dippers.
• Reduced LV global longitudinal and circumferential strains were observed in nondippers and reverse dippers.
• Nondipping and reverse dipping BP patterns were independently associated with reduced LV longitudinal strain, and reverse dipping with reduced LV circumferential strain.

Conclusions:

• Nondipping and reverse dipping BP patterns significantly impair LV mechanics in hypertensive patients.
• LV functional and mechanical remodeling deteriorates with less pronounced nocturnal BP dipping.
• These findings highlight the clinical importance of BP patterns in hypertensive individuals.