Algorithm 1 Algorithm for PAC/PVC Detection on AF Windows

Input: ${\theta }_{123}:=$ degrees of included angle for ‘1-2-3’ pattern

${\theta }_{645}:=$ degrees of included angle for ‘6-4-5’ pattern

$n_{123}:=$ number of ‘1-2-3’ pattern

$n_{645}:=$ number of ‘6-4-5’ pattern

$r_{zero}:=$ ratio of zero quadrants.

Output: $Arrhythmia$ type as NSR, PAC/PVC, or AF.

1: if $(n_{123}+n_{645})\ge 3$ then

2: Calculate $st{d}_{123}$ and $st{d}_{645}$, the standard deviation of ${\theta }_{123}$ and ${\theta }_{645}$, respectively.

3: if $n_{645}\le 1$ then

4:  Set $st{d}_{645}=0$.

5: end if

6: if $n_{123}\le 1$ then

7:  Set $st{d}_{123}=0$.

8: end if

9: if $st{d}_{123}\le 10$ && $st{d}_{645}\le 10$ then

10:  $Arrhythmia=$PAC/PVC.

11: else

12:  if $r_{zero}<0.13$ then

13:   $Arrhythmia=$AF.

14:  else

15:   $Arrhythmia=$NSR.

16:  end if

17: end if

18: else

19: if $r_{zero}<0.5$ then

20:  $Arrhythmia=$AF.

21: else

22:  $Arrhythmia=$NSR.

23: end if

24: end if

25: return $Arrhythmia$