Atrial fibrillation was associated with significantly impaired global longitudinal strain compared to sinus rhythm (-12.25% vs. -16.13%, p<0.0001) independent of age, sex, heart rate, LVEF and LV mass.
Case-Control (n=300)
No
Does atrial fibrillation impair global longitudinal strain and strain rate compared to sinus rhythm independent of LVEF?
Atrial fibrillation is associated with impaired global longitudinal strain independent of LVEF, suggesting reduced ventricular systolic performance even in patients with normal ejection fraction.
Absolute Event Rate: -12.25% vs -16.13%
p-value: p=<0.0001
BACKGROUND: Atrial fibrillation (AF) is the most common aberrant cardiac arrhythmia. Many AF patients present with symptoms of dyspnea and fatigue, but have normal left ventricular ejection fraction (LVEF). PURPOSE: To determine the reproducibility of measurements of global longitudinal strain (GLS) and strain rate in patients with AF and examine if the arrhythmia is associated with abnormal LV strain and strain rate independent of age, sex, heart rate, LVEF and LV mass. We hypothesized that AF independently reduces ventricular systolic performance. METHODS: The study was conducted as a retrospective analysis of images from 150 randomly selected patients with AF compared to an equal number of subjects with sinus rhythm (SR) matched for age, sex, heart rate, LVEF and LV mass. Half of the patients had normal LVEF (LVEF > 50%) and half had reduced LVEF (LVEF < 50%). GLS and strain rate were measured in each group, as were quantitative LV volumes and standard systolic and diastolic parameters. Results: GLS was significantly impaired in patients with AF compared to subjects with SR, both in the overall population (-12.25 ± 4.1% vs. -16.13 ± 4.7%, p<0.0001), in patients with normal LVEF (-14.41 ± 3.9% vs. -19.42 ± 3.1%, p<0.0001) and in patients with reduced LVEF (-10.10 ± 3.1% vs. -12.85 ± 3.5%, p<0.0001).Linear regression and Bland Altman analyses demonstrated good intraobserver and interobserver agreement for measurements of GLS and strain rate parameters even in patients with AF.
Bue F. Ross Agner (Fri,) conducted a case-control in Atrial Fibrillation (n=300). Atrial Fibrillation vs. Sinus Rhythm was evaluated on Global longitudinal strain (GLS) (p=<0.0001). Atrial fibrillation was associated with significantly impaired global longitudinal strain compared to sinus rhythm (-12.25% vs. -16.13%, p<0.0001) independent of age, sex, heart rate, LVEF and LV mass.