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Echocardiographic Structure and Function in Elderly Patients With Atrial Fibrillation in Japan - The ANAFIE
Ken-Ichi Hiasa1, Hidetaka Kaku1, Goro Kawahara1
1Kyushu University.
Insights
Elderly patients with atrial fibrillation (AF) and heart failure (HF) often show left atrial (LA) enlargement and impaired function. These findings highlight the cardiac structural and functional impact of AF and HF in older populations.
Area of Science:
- Cardiology
- Geriatrics
- Echocardiography
Background:
- Limited echocardiographic data exists for elderly patients with atrial fibrillation (AF) and heart failure (HF).
- The ANAFIE Registry subcohort study aimed to characterize cardiac structure and function in this population.
Purpose of the Study:
- To analyze echocardiographic parameters in elderly patients with AF and HF.
- To identify specific cardiac structural and functional characteristics associated with these conditions.
Main Methods:
- Analysis of echocardiographic data from 1,494 elderly patients within the ANAFIE Registry.
- Assessment of left atrial (LA) volume, LA reservoir function, mitral and tricuspid regurgitation, and left ventricular (LV) parameters.
Main Results:
- Half of the patients exhibited severe LA enlargement (≥48 mL/m²), strongly correlating with impaired LA reservoir function.
- AF type and rhythm significantly impacted LA volume and function.
- History of HF was associated with more frequent moderate-to-severe mitral/tricuspid regurgitation and higher early diastolic mitral inflow velocity to mitral annulus velocity ratio.
Conclusions:
- Left atrial enlargement and dysfunction are prevalent in elderly patients with non-valvular AF and a history of HF.
- These patients also demonstrated increased LV mass index, reduced LV ejection fraction, and elevated heart rate.
Background:
Echocardiographic data on the cardiac structure and function in elderly patients with atrial fibrillation (AF) and heart failure (HF) are limited. This subcohort study of the ANAFIE Registry analyzed echocardiographic parameters to identify cardiac structural and functional characteristics.
Methods And Results:
Of 32,726 subjects in the ANAFIE population, 1,494 (4.6%) were entered as the echocardiography subcohort. Half of the patients, including those with persistent and permanent AF, older age (≥80 years), and CHADS2score ≥2, had left atrial (LA) volume index ≥48 mL/m2, indicating severe LA enlargement. LA enlargement significantly correlated with impaired LA reservoir function, regardless of age and CHADS2score. Types of AF and rhythm were strongly related to LA volume and reservoir function (P<0.0001). Moderate-to-severe mitral and tricuspid regurgitation were significantly more common, and the early diastolic mitral inflow velocity to mitral annulus velocity ratio was significantly higher among patients with than without HF history (all, P<0.0001).
Conclusions:
In this subcohort, LA enlargement correlated with impaired LA reservoir function. Elderly patients with non-valvular AF and a history of HF had LA enlargement and dysfunction, increased LV mass index, low LV ejection fraction, and high heart rate.
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