Table 1 Filament and FT metrics during fast pacing (270-ms to 250-ms CL).

From: Mechanisms of arrhythmogenesis related to calcium-driven alternans in a model of human atrial fibrillation

 

ALTfast

ALTslow

U

p

Duration of arrhythmia (ms)

3328

15894

—

—

Number of filaments during arrhythmia

4.50

7.07

16111484.5

<10−6

Number of filaments

527

3197

—

—

Filament duration (ms)

28.4

35.2

808583

0.14

Number of FTs

198

976

—

—

FT duration (ms)

56.0

84.8

82880.5

0.002

FT composition metrics

    

Number of filaments/FT

2.66

3.28

84377.5

<0.001

Mean filament duration/FT (ms)

33.8

40.8

92282.5

0.32

Max filament duration/FT (ms)

47.8

63.3

84714

0.006

Sum of filament durations/FT (ms)

75.6

115.3

82306.5

<0.001

  1. Mean values for the ALTfast and ALTslow simulations are reported for all metrics except for duration of arrhythmia, number of filaments, and number of FTs. Differences in distribution between the ALTfast and ALTslow simulations were assessed with the Mann-Whitney U statistic, with p < 0.05 considered significant.
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