Mapping Cardiac Pathologies using Nonlinear Analysis for ECG Signals

Send This

Download

Comment

Favourite

more

Rating :

Rate It:

Embed :

ivan mickoski on Oct 20, 2009 Says :

01825e

bhushananita on Sep 05, 2009 Says :

I wants to learn more about arrthymia

Post a comment

Post Comment on Twitter Post Comment on SlideWorld

Comments:

Subscribe to follow-up comments

Notes

Hide Notes

Slide 1 :

Maide Bucolo, Luigi Fortuna, Francesca Sapuppo A New Characterization of Chaotic Dynamics in ECG: 8 FACOLTA’ DI INGEGNERIA ,Università degli Studi di Catania, Italy Aldo Bonasera Laboratori Nazionali del Sud, INFN, Catania Italy bonasera@lns.infn.it Cyclotron Institute Texas A&M university, College Station,Tx

Slide 2 :

Outline

Slide :

Slide 4 :

Biological Problem Heart Physiology ECG Sequential atrial activation (depolarization) Simultaneously ventricular activation (depolarization) ventricular repolarization After depolarizations in the ventricles

Slide 5 :

Biological Problem ECG wave shape characterization Arrhythmia Ventricular Arrhythmia Bradycardia Normal REGULAR RHYTHM IRREGULAR RHYTHM REGULAR RHYTHM Difference In Wave Shape And Frequency : P ,T AND U WAVE INDISTINCT. IRREGULAR RHYTHM

Slide :

Slide 8 :

8 Example: maps a,b) Logistic map xn+1=rxn(1-xn) r[0,4] r=4 r=3.771 c) Triangular map xn+1=r(1-2|0.5-xn|) r[0,1] d) Sine map xn+1=xn+rsin(2pi xn) r[0,0.7326] r=1 r=0.73 r control parameter

Slide 9 :

9 LOGISTIC MAP TRIANGUALRMAP V.Baran and A.B. arxiv:chao-dyn/9804023

Slide 10 :

The Algorithm Input Parameters

Slide 11 :

The Algorithm Trajectories Satisfy both initial condition and distance constrains. Trajectories are generated from this Satisfy the requirements of initial condition.

Slide :

Slide 14 :

Parametric Study Initial Condition In P-wave choose the points in order to extract coherent trajectories

Slide 15 :

Parametric Study Extraction of dj parameters From points in P-wave extract dj that have asymptotic behaviour and present limited oscillation

Slide 16 :

Parametric Study Range of initial condition dj trend not dependent on initial condition (in P-wave) Small Range 20% d0 Range in Std(Amplitude) 3% d0 Range in Std(Amplitude)

Slide :

Slide 18 :

Parametric Study Control Parameter Logistic Map ECG Signals

Slide 19 :

Results Index

Slide :

Slide 21 :

Results (d8 - ?MAX) vs Area

Slide 22 :

Results (d8 - ?MAX) vs ?

Slide 23 :

Results (d8 - ?MAX) vs Power

Slide 24 :

Results (d8 - ?MAX) vs Power2 | |

Slide 25 :

Results d8 vs ?MAX (Patology: Normal)

Slide 26 :

Results d8 vs ?MAX (Patology: Arrhythmia)

Slide 27 :

Results d8 vs ?MAX (Patology: Ventr. Arrhythmia)

Slide 28 :

Results d8 vs ?MAX (All Patology)

Slide 29 :

Future Development Possible Solution

Slide 30 :

Conclusions Application Biomedical Application: Automatic Diagnostic Theoretical study healthy unhealthy The asymptotic distance between trajectories, d8, has been obtained from computation of dj dj trend is similar to one reported in literature on Chaotic System Need more medical statistics and inputs!

Slide 31 :

Slide 32 :

32 Allievi: Maria Rita Di Bartolomeo special thanks to Giuseppe Garifoli Antonio Spampinato FACOLTA’ DI INGEGNERIA

ADVERSE CEREBRAL OUT...

Cardiac Electrophysi...

Ventricular Arrhythm...

A Hands On Approach ...

Revision of a Medica...

Cardiac CTCalcium sc...

Free Powerpoint Templates





1557 Views, 0 favourite

More By User Flag as inappropriate Select your reason for flagging this presentation as inappropriate. If needed, use the feedback form to let us know more details. Cancel