Successful radiofrequency catheter ablation of atrial fibrillation is associated with improvement in left ventricular energy loss and mechanics abnormalities

Dissipative energy loss (EL), an index of inefficient blood flow, has not been studied in patients with atrial fibrillation (AF). We therefore assessed the effect of AF and of successful catheter ablation on left ventricular (LV) EL and global longitudinal strain (GLS) to explore the effect of ineff...

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Bibliographic Details
Published in:The International Journal of Cardiovascular Imaging 2019-03, Vol.35 (3), p.427-435
Main Authors: Lin, Mingjie, Hao, Li, Cao, Yuan, Xie, Fei, Han, Wenqiang, Rong, Bing, Zhao, Yachao, Zhong, Jingquan
Format: Article
Language:English
Subjects:
Ablation
Abnormalities
Adult
Aged
Atrial Fibrillation - diagnostic imaging
Atrial Fibrillation - physiopathology
Atrial Fibrillation - surgery
Biomechanical Phenomena
Blood flow
Cardiac arrhythmia
Cardiac Imaging
Cardiology
Case-Control Studies
Catheter Ablation
Catheters
Confidence intervals
Contraction
Diastole
Echocardiography, Doppler
Energy dissipation
Energy loss
Female
Fibrillation
Flow mapping
Heart
Humans
Imaging
Male
Mechanics (physics)
Medical instruments
Medicine
Medicine & Public Health
Middle Aged
Myocardial Contraction
Original Paper
Patients
Radio frequency
Radiofrequency ablation
Radiology
Recovery of Function
Regression analysis
Rhythm
Statistical analysis
Stress, Mechanical
Systole
Time Factors
Treatment Outcome
Ventricle
Ventricular Function, Left
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Summary:Dissipative energy loss (EL), an index of inefficient blood flow, has not been studied in patients with atrial fibrillation (AF). We therefore assessed the effect of AF and of successful catheter ablation on left ventricular (LV) EL and global longitudinal strain (GLS) to explore the effect of inefficient blood flow on LV remodeling. In 53 patients undergoing catheter ablation for AF (AF group), LV EL (in mW/m) was evaluated by vector flow mapping (VFM) during systole (ELsys), early diastole (ELed) and atrial contraction phase (ELac), and GLS was calculated by two-dimensional tissue tracking (2DTT). Of the 53 patients, 37 patients who sustained sinus rhythm and completed echocardiographic evaluation at baseline and at 3 and 6 months follow-up were examined for change in EL and GLS. The latter parameters also were assessed in 44 age- and sex-matched controls. At baseline in AF group, ELsys and ELed were significantly higher (3.97 ± 2.29 vs. 3.14 ± 1.01; and 9.22 ± 5.01 vs. 3.89 ± 1.51; both P  
ISSN:1569-5794
1573-0743
1875-8312
DOI:10.1007/s10554-018-1457-3