for ECG evaluation Prof J Hanáček MD PhD Physiologic ECG curve its parts Standard bipolar and augmented unipolar leads ECG record from standard ID: 1046912
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1. Electrophysiologic backround for ECG evaluationProf. J. Hanáček, MD, PhD
2. Physiologic ECG curve – its parts
3. Standard bipolar and augmented unipolar leads
4. ECG record from standard limb leads
5. Precordial leads
6. Scheme of horizontal cut of chest with projection of chest leads and direction of atrial and ventricular depolarisation
7. Calculation of heart rate from ECG curve
8. Evaluation of ECG curveBasic information on the patient –age gender, reason for recording ECG, preliminary DgTechnical parameters of ECG curve – speed of recording, sensitivity of recording device3) Date and time of ECG recording
9. Calculation of heart rate
10. Electric axis of a heart
11. Factors which influence electric axis of hart
12. How to create electric axis of a heart – lead I
13. How to create electric axis of a heart – lead I and aVF
14. Left axis deviation
15. Right axis deviation
16. Description QRS complex deflections
17. Heart rhythmsSinus rhythmAtrial rhythmJunctional rhythm (atrio-ventricular)Ventricular rhythm● Heart rhythm is not heart rate, is not regularity of heart function● Heart rhythm means localisation of source of electrical impuls for activation of heart
18. Sinus rhythmheart function ic controled by sinus node activityCharacteristics of sinus rhythm:There should be P wave in front of QRS complexP wave is negativ in aVR lead and positive in aVF leadP wave should have normal duration and shape
19. Junctional rhythm Polarity of P wave is changed Localisation of P wave is also changed
20. Passive ventricular depolarisation – escape beat
21. Simple guide for ECG evaluationIn ECG curve is hidden a lot of important information useful for understanding heart function under physiologic and pathologic conditions To find this informations you should have appropriate knowledge and ability to observe carefully the ECG curveFor good result of ECG curve evaluation is necessary to evaluate it systematically – using some type of algorhythm
22. Characteristics of patient – age, gender, date of ECG record was done preliminary diagnosis, other informations on patient2) To control technical quality of ECG record, speed of ECG record, sensuitivity of recording device (inappropriate contact of electrodes with the skin, interference of electricity, otherEvaluation frequency of QRS complexes, P wavesEvaluation of heart rhythmEvaluation of heart axisEvaluation of separate waves, deflections, segments and intervals Each abnormality should be taken into accont