ECG Guyton 2011 Chapter 11 Session 5 1 Electrocardiogram What is the ECG How the ECG was recorded What are the characteristics of ECG paper What are the waves intervals and segments of ECG ID: 273192
Download Presentation The PPT/PDF document "Electrocardiogram" is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.
Slide1
Electrocardiogram (ECG)
Guyton 2011 Chapter 11
Session 5
1Slide2
Electrocardiogram
What is the ECG?How the ECG was recorded?What are the characteristics of ECG paper?What are the waves, intervals and segments of ECG?What is lead? How many lead are usually recorded?
What is the Einthoven law?What is vector?What can we earn from ECG?
Objects
2Slide3
Electrocardiogram
3Slide4
Electrocardiogram
Atrial contraction
Begins
Complete
Ventricular contraction
Begins
Complete
Ventricular Relaxation
4Slide5
Electrocardiogram
Recording of the ECG
5Slide6
Recording of the ECG
Electrocardiogram
Depolarization
Begins
Complete
Repolarization
Begins
Complete
6Slide7
Flow of Current Around the Heart During the Cardiac Cycle
Electrocardiogram7Slide8
Flow of Electrical Currents in the Chest Around the Heart
Electrocardiogram8Slide9
Electrocardiogram
9Slide10
Electrocardiogram
10Slide11
Time (s)
Voltage (mv)
Wave or complex and interval
0.1 - 0.3
P
1 - 1.5
QRS
0.2-0.3
T
0.16
PQ
(PR)
0.35
QT
Electrocardiogram
11Slide12
Heart Rate Determination from ECG
Electrocardiogram12Slide13
Electrocardiographic Leads
ElectrocardiogramBipolar Limb Leads
Unipolar Limb Leads
Chest Leads (PrecordiaI Leads)
I
II
III
aVR
aVL
aVF
V1
V2
V3
V4
V5
V6
13Slide14
Electrocardiographic Leads
aVF
14Slide15
Electrocardiographic Leads
Standard Bipolar Limb Leads
Electrocardiogram15Slide16
Standard Bipolar Limb Leads
Electrocardiogram
16Slide17
Einthoven's Law
I + III = IIElectrocardiogram
17Slide18
Electrocardiogram
18Slide19
Vectorial Analysis of Electrocardiograms
Electrocardiogram
19Slide20
Unipolar Limb Leads
Electrocardiogram
20Slide21
Vectorial Analysis of Electrocardiograms
Electrocardiogram
21Slide22
Electrocardiographic Leads (
Horizontal plane)Electrocardiogram22Slide23
The anatomical orientation of the heart
The relative sizes of its chambersThe various disturbances of rhythmConduction, the extent and location of ischemic damage to the myocardium and its progressThe effects of altered electrolyte concentrationsThe influence of certain drugs (notably digitalis, antiarrhythmic agents, and Ca
++channel antagonists).Electrocardiogram
Findings from ECG
23Slide24
The End
24