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Updated: Jun 11, 2026
09:20
Lumped-Parameter and Finite Element Modeling of Heart Failure with Preserved Ejection Fraction
Published on: February 13, 2021
Reduced left atrial function on exercise in patients with heart failure and normal ejection fraction.
Y T Tan1, F Wenzelburger, E Lee
1Department of Cardiovascular Medicine, University of Birmingham, Birmingham, UK.
Heart (British Cardiac Society)
|June 30, 2010
Summary
Patients with heart failure with normal ejection fraction (HFNEF) experience reduced left atrial (LA) function during exercise. This impaired LA function contributes to exercise intolerance and breathlessness in HFNEF.
Area of Science:
- Cardiology
- Cardiovascular Physiology
- Echocardiography
Background:
- Heart failure with normal ejection fraction (HFNEF) is characterized by exertional dyspnea.
- The role of left atrial (LA) compensatory mechanisms during exercise in HFNEF remains unclear.
Purpose of the Study:
- To investigate the hypothesis that impaired LA compensatory mechanisms during exercise contribute to symptoms in HFNEF patients.
- To assess LA function and its relationship with exercise capacity in HFNEF.
Main Methods:
- Compared rest and exercise echocardiography in 50 HFNEF patients, 15 hypertensive subjects, and 30 healthy controls.
- Assessed mitral annular velocities (Am) using color tissue Doppler echocardiography.
- Calculated the LA functional reserve index.
Main Results:
- HFNEF patients exhibited significantly lower exercise Am and LA functional reserve index compared to controls.
- Elevated LA volume index was observed in HFNEF patients.
- Exercise Am correlated significantly with peak VO2 max and E/Em.
Conclusions:
- HFNEF patients demonstrate reduced LA function during exercise, alongside ventricular dysfunction.
- Impaired LA function likely plays a significant role in exercise intolerance and dyspnea in HFNEF.
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