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Ecg & 12 lead ecg
The document provides an overview of electrocardiography (ECG) and 12-lead ECG. It discusses the anatomy and electrical conduction system of the heart, the cardiac cycle, how to interpret an ECG, and examples of normal and abnormal ECG rhythms. It also describes how to properly apply the electrodes to obtain a 12-lead ECG. Key topics covered include the waves, intervals, and segments that make up the ECG; the rates that define normal and abnormal rhythms; questions to consider when interpreting an ECG; and examples of ECG strips showing normal sinus rhythm as well as arrhythmias like atrial fibrillation, heart block, and ventricular tachycardia.
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Ecg & 12 lead ecg
- 1. ECG & 12LEAD ECG MIRITI M.D MT ELGON COUNTY HOSPITAL COUNTY GOVERNMENT OF TRANS NZOIA 2011 American Heart Association: Advanced Cardiovascular Life Support Provider Manual.
- 2. QUICK REVIEW OFTHE HEART • Purpose- Pumps blood • Basic anatomy – 4 chambers, 2 sides, 4 Valves • The Conductive System- SA NODE (60-100), Internodal pathway, AV Node ( 40-60), Bundle of HIS, Bundle branches, Purkinje fibers. Ventricular nodes (20-60) • Cardiac cells- Automaticity, Excitability, Conductivity, Contractility.
- 3. 3 THE CONDUCTING SYSTEMOF THE HEART • SA Node • Inter-nodal pathway • AV Node • Bundle of HIS • Bundle Branches • Purkinje Fibers
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- 6. ECG INTERPRETATION • ECGstands for Electrocardiogram or Electrocardiography, some countries use EKG as the abbreviation. • The ECG Paper. Horizontal axis (Time) 0.04 sec, Vertical axis is Energy • Waveform- Movement away from the isoelectric line • Segment- Distance between two waves • Interval- Wave plus a segment
- 7. THE NORMAL ECG •P- Atrial depolarization • PR Interval is usually about 0.2 sec ( SA Node to Atrium to AV Node to bundle branches up to purkinje fibers) NB: Not greater than one big box. • QRS-Ventricular depolarization about 0.12 sec NB: Not more than 3 small boxes • RATE= 300 𝑁𝑜 𝑜𝑓 𝐵𝐼𝐺 𝑏𝑜𝑥𝑒𝑠 𝑖𝑛 𝑏𝑒𝑡𝑤𝑒𝑒𝑛 𝑅−𝑅 OR 1500 𝑛𝑜 𝑜𝑓 𝑠𝑚𝑎𝑙𝑙 𝑏𝑜𝑥𝑒𝑠 𝑖𝑛 𝑏𝑒𝑡𝑤𝑒𝑒𝑛 𝑅−𝑅 • Rhythm- Regular
- 8. ECG INTERPRETATION BASICQUESTIONS Is the Rhythm • Regular or Irregular • Fast or Slow • Wide or Narrow QRS Complex • Normal P wave (Not bigger than 1 big box and followed by QRS) • PR Interval • Is QRS Normal
- 9. NORMAL SINUS RHYTM Rate-60-100 bpm Rhythm- Regular P before each QRS PR interval = 0.12 to 0.20 sec QRS= < 0.12 sec
- 10. SINUS BRADYCARDIA • Rate<60bpm • Rhythm- Regular • P before each QRS • PR interval 0.12 to 0.20 Seconds • QRS < 0.12 seconds
- 11. SINUS TACHYCARDIA • Rate> 100bpm • Rhythm- Regular • P before each QRS Complex • PR Interval =0.12 to 0.20 sec • QRS < 0.12 sec
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- 21. 21 HOOKING UP THE 12-LEADECG • Proper skin prep • Placement of the limb electrodes • Placement of the chest electrodes
- 22. 22 ELECTRODE PLACEMENT • LIMBLEADS • CHEST LEAD
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- 29. BASIC ECG STRIPS FORACLS PROTOCOLS
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- 34. Atrial Fibrillation withSlow Ventricular Rate
- 35. Atrial Fibrillation withRapid Ventricular Rate
- 36. First Degree A-VBlock
- 37. Second Degree A-VBlock – Mobitz Type I – Wenckebach Block
- 38. Second Degree A-VBlock – Mobitz Type II
- 39. Third Degree (Complete)A-V Block
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