Left Atrial Strain Predicts Cardiovascular and All-Cause Mortality

Area of Science:

• Cardiology
• Echocardiography
• Cardiac Function Assessment

Background:

• Left atrial strain is a key indicator of left atrial function.
• Previous studies had limited follow-up periods and did not focus on patients with borderline diastolic function.
• This study aimed to assess left atrial strain's predictive value for mortality with a longer follow-up.

Purpose of the Study:

• To investigate the survival predictive value of left atrial strain using a longer follow-up duration.
• To evaluate the prognostic capability of left atrial strain in patients with borderline diastolic function.

Main Methods:

• 652 participants underwent 2-D speckle tracking echocardiography to assess left atrial reservoir function (peak atrial longitudinal strain).
• Study endpoints included all-cause and cardiovascular mortality.
• Median follow-up was 92 months.

Main Results:

• Lower left atrial strain was a significant predictor of both all-cause and cardiovascular mortality in univariable analysis.
• After adjusting for clinical and echocardiographic parameters, lower left atrial strain remained associated with increased all-cause (HR=0.942) and cardiovascular mortality (HR=0.915).
• Left atrial strain also predicted cardiovascular mortality in patients with borderline left ventricular diastolic function.

Conclusions:

• Left atrial strain is a valuable predictor of all-cause and cardiovascular mortality.
• Its predictive value persists even after adjusting for common clinical and echocardiographic factors.
• Left atrial strain is a significant prognostic marker, particularly in patients with borderline diastolic function.