Ecg basics conduction tissue
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This document discusses Dr. Md.Toufiqur Rahman's credentials as an Associate Professor of Cardiology and then provides examples of different types of conduction tissue pathology in electrocardiograms (ECGs), including sinoatrial block, first degree block, second degree block (Mobitz type 2 and Wenckebach), second degree block (2:1), and complete (third degree) block. Diagrams of ECG tracings are shown to illustrate each type of block.
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Ecg basics conduction tissue
- 1. Dr. Md.Toufiqur Rahman MBBS, FCPS, MD, FACC, FESC, FRCP, FSCAI, FAPSIC, FAPSC Associate Professor of Cardiology National Institute of Cardiovascular Diseases Sher-e-Bangla Nagar, Dhaka-1207
- 2. Dr. Md.Toufiqur Rahman MBBS, FCPS, MD,FACC, FESC, FRCP, FSCAI, FAPSIC, FAPSC
- 5. Leads of ECG
- 7. Pathology of conduction tissue
- 8. Sinoatrial block • Sinus rhythm for three beats, then a 'sinus pause' • P waves arrowed • The expected P wave is not seen, but the SA node must have been depolarized because the next P wave appears at the predicted time
- 9. First degree block • Sinus rhythm • PR interval is constant (360 ms)
- 10. Second degree block (Mobitz type 2) • Sinus rhythm with a normal PR interval • One P wave (arrowed) is not followed by a QRS complex
- 11. Second degree block (Wenckebach) • Three beats with progressively longer PR intervals are followed by a non-conducted P wave (arrowed) • The next PR interval is short, but this is followed by a longer PR interval and then another non-conducted beat
- 12. Second degree block (2:1) • The conducted beats have a normal PR interval • Alternate P waves are not followed by a QRS complex ;
- 13. Complete (third degree) block • No relationship between P waves (arrowed) and QRS complexes • The QRS complexes are normal, indicating that the origin of ventricular depolarization is within the His bundle • The ventricular rate is 30/min
- 14. Complete (third Degree) block • No relationship between P waves (arrowed) and QRS complexes • Wide QRS complexes • Ventricular rate of 22/min
- 15. Thank You All