Supervised Machine Learning Based Noninvasive Prediction of Atrial Flutter Mechanism from P-to-P Interval Variability under Imbalanced Dataset Conditions

Table 2

Patients’ demography.

Variable	Focal AFL	Macroreentrant AFL
Cycle length (msec)	230 ± 22.36	248.10 ± 39.38
Before cardiac surgery or ablation	3/5	22/41
Left circuit	2/5	19/41
NonCTI	5/5	19/41

() three ECGs are undefined and () one ECG is defined.