Validation of echocardiographic left atrial parameters in atrial fibrillation using the index beat of preceding cardiac cycles of equal duration
Govindan, Malini × Kiotsekoglou, Anatoli Saha, Samir K Borgulya, Gabor Bajpai, Abhay Bijnens, Bart Sagnella, Giuseppe Camm, John A #
Journal of the American Society of Echocardiography vol:24 issue:10 pages:1141-1147
The clinical assessment of left atrial function during atrial fibrillation is challenging and often inaccurate because of the beat-to-beat variability in the cycle length. The aim of this study was to validate the use of an index beat, the beat following two preceding cardiac cycles of equal duration, for the measurement of left atrial functional indices, including area, volume, and expansion index. The index beat was compared with the conventional but time-consuming method of averaging multiple consecutive cardiac cycles.