Method for detecting pathologies using cardiac activity data

1. A method for determining a pathology in a subject, said method comprising:

a) correlating N-N intervals with rate dependent fluctuations of electrocardiographic parameters, said electrocardiographic parameters selected from one or more of: coupling interval (CI) of premature ventricular complexes (V) to sinus beat (N), time intervals between consecutive V beats, number of intervening sinus beats (NIB) between two V beats, incidence of NIB values and onset of bigeminy after short-long R-R sequences and derived from an electrocardiogram (ECG) of said subject or other recordings reflecting cardiac activity of said subject to derive electrocardiographic parameter correlation values, wherein said pathology is determined based on said correlation values.

2. The method as claimed in claim 1 , which further comprises step i) prior to step a):

i) obtaining an electrocardiogram (ECG) of said subject or other recordings reflecting cardiac activity of said subject.

3. The method as claimed in claim 1 , wherein said pathology is associated with cardiac arrhythmias.

4. The method as claimed in claim 1 , wherein said step of correlating comprises obtaining heartprint analysis of said electrocardiographic parameters.

5. The method as claimed in claim 1 wherein said pathology is determined based on a relationship between N-N intervals and V-V intervals, N-N intervals and number of N beats between two V beats and N-N intervals and Cl.

6. The method as claimed in claim 1 wherein said pathology is determined based on a value indicative of proportion of premature ventricular complex (PVC) involved in V-N beat patterns.

7. The method as claimed in claim 1 , wherein said pathology is sudden cardiac death or cardiac arrest.

8. The method as claimed in claim 4 , wherein said pathology is sudden cardiac death or cardiac arrest.

9. The method as claimed in claim 1 , wherein said pathology is determined based on a relationship between N-N intervals and incidence of NIB values.

10. The method as claimed in claim 1 wherein said pathology is determined based on a relationship between N-N intervals and V-V intervals, N-N intervals and number of N beats between two V beats, N-N intervals and incidence of NIB values and N-N intervals and Cl.

11. The method as claimed in claim 1 , wherein identification of frequent ventricular bigeminy, relatively fixed coupling intervals, and onset of bigeminy after short-long RR sequences is indicative the subject has an increased risk of sudden cardiac death syndrome.

12. The method as claimed in claim 11 , wherein the pathology is associated with early afterdepolarizations(EAD).

13. The method as claimed in claim 11 , wherein the pathology is associated with delayed after depoloarizations (DAD).

14. The method as claimed in claim 1 , wherein said pathology is high risk of Torsade de pointes (TdP).

15. The method as claimed in claim 1 , wherein the pathology is induced by pharmacologic agents.

16. A method for determining a pathology in a subject, said method comprising:

a) determining an incidence of occurrence of NIB values derived from an electrocardiogram (ECG) of said subject or other recordings reflecting cardiac activity of said subject to derive NIB value incidence correlation values, wherein said pathology is determined based on said correlation values.

17. The method as claimed in claim 16 , which further comprises step i) prior to step a):

i) obtaining an electrocardiogram (ECG) of said subject or other recordings reflecting cardiac activity of said subject.

18. The method of claim 16 , wherein said step of determining comprises obtaining heartprint histogram analysis of said frequency of occurrence of NIB values.

19. The method of claim 16 , wherein the determining is over a 24 hour period.

20. The method as claimed in claim 16 , wherein said pathology is sudden cardiac death or cardiac arrest.