chapter 11 the normal electrocardiogram rhythmical ... · pdf fileconnections of the body with...
TRANSCRIPT
![Page 1: Chapter 11 The Normal Electrocardiogram Rhythmical ... · PDF fileConnections of the body with the ECG for recording unipolar augmented leads. aVR aVL aVF Recordings between one limb](https://reader033.vdocuments.mx/reader033/viewer/2022042708/5a7921777f8b9a7b548d5d7e/html5/thumbnails/1.jpg)
RhythmicalExcitation
of the Heart
RhythmicalExcitation
of the Heart
Chapter 10Chapter 10Chapter 11
The Normal Electrocardiogram
![Page 2: Chapter 11 The Normal Electrocardiogram Rhythmical ... · PDF fileConnections of the body with the ECG for recording unipolar augmented leads. aVR aVL aVF Recordings between one limb](https://reader033.vdocuments.mx/reader033/viewer/2022042708/5a7921777f8b9a7b548d5d7e/html5/thumbnails/2.jpg)
Action potentials of specialized fibersSection II-plate 11, Netter
![Page 3: Chapter 11 The Normal Electrocardiogram Rhythmical ... · PDF fileConnections of the body with the ECG for recording unipolar augmented leads. aVR aVL aVF Recordings between one limb](https://reader033.vdocuments.mx/reader033/viewer/2022042708/5a7921777f8b9a7b548d5d7e/html5/thumbnails/3.jpg)
“Normal electrocardiogram”.
Guyton, Figure 11-1. Copyright 2000, WB Saunders Company, All Rights Reserved
1 inch = 1 sec
0.2 sec
Note the “time calibration”
P-Q Interval (or P-R if Q is missing) ~ 0.16 sec
QT Interval ~ 0.35 sec
5 big blocks = 1sec
(P-Q)
![Page 4: Chapter 11 The Normal Electrocardiogram Rhythmical ... · PDF fileConnections of the body with the ECG for recording unipolar augmented leads. aVR aVL aVF Recordings between one limb](https://reader033.vdocuments.mx/reader033/viewer/2022042708/5a7921777f8b9a7b548d5d7e/html5/thumbnails/4.jpg)
Recording depolarization and repolarization waves from a cardiac
muscle fiber.
Guyton Figure 11-2. Copyright 2000, WB Saunders Company, All Rights Reserved
![Page 5: Chapter 11 The Normal Electrocardiogram Rhythmical ... · PDF fileConnections of the body with the ECG for recording unipolar augmented leads. aVR aVL aVF Recordings between one limb](https://reader033.vdocuments.mx/reader033/viewer/2022042708/5a7921777f8b9a7b548d5d7e/html5/thumbnails/5.jpg)
See Guyton –Figure 11-3
![Page 6: Chapter 11 The Normal Electrocardiogram Rhythmical ... · PDF fileConnections of the body with the ECG for recording unipolar augmented leads. aVR aVL aVF Recordings between one limb](https://reader033.vdocuments.mx/reader033/viewer/2022042708/5a7921777f8b9a7b548d5d7e/html5/thumbnails/6.jpg)
Instantaneous potentialsdeveloped
the surface of a cardiac muscle mass.
Guyton Figure 11-4. Copyright 2000, WB Saunders Company, All Rights Reserved
![Page 7: Chapter 11 The Normal Electrocardiogram Rhythmical ... · PDF fileConnections of the body with the ECG for recording unipolar augmented leads. aVR aVL aVF Recordings between one limb](https://reader033.vdocuments.mx/reader033/viewer/2022042708/5a7921777f8b9a7b548d5d7e/html5/thumbnails/7.jpg)
Flow of current in the chest around partially depolarized ventricles.
Guyton Figure 11-5. Copyright 2000, WB Saunders Company, All Rights Reserved
![Page 8: Chapter 11 The Normal Electrocardiogram Rhythmical ... · PDF fileConnections of the body with the ECG for recording unipolar augmented leads. aVR aVL aVF Recordings between one limb](https://reader033.vdocuments.mx/reader033/viewer/2022042708/5a7921777f8b9a7b548d5d7e/html5/thumbnails/8.jpg)
Guyton Figure 11-6.Copyright 2000, WB Saunders Company, All Rights Reserved
Einthoven’s Triangle
Three Biopolar Limb Leads:conventional arrangement of electrodes for recording standard ECG leads.
![Page 9: Chapter 11 The Normal Electrocardiogram Rhythmical ... · PDF fileConnections of the body with the ECG for recording unipolar augmented leads. aVR aVL aVF Recordings between one limb](https://reader033.vdocuments.mx/reader033/viewer/2022042708/5a7921777f8b9a7b548d5d7e/html5/thumbnails/9.jpg)
0.5 mV
1.2 mV
0.7 mV
Normal ECGs recorded from the three standard limb leads.
Einthoven’s law: if the electrical potentials of any two limb leads are known, the third one can be determined. The sum of the voltages in leads I and III equals Lead II.
Figure 11-7. Copyright 2000, WB Saunders Company, All Rights Reserved
![Page 10: Chapter 11 The Normal Electrocardiogram Rhythmical ... · PDF fileConnections of the body with the ECG for recording unipolar augmented leads. aVR aVL aVF Recordings between one limb](https://reader033.vdocuments.mx/reader033/viewer/2022042708/5a7921777f8b9a7b548d5d7e/html5/thumbnails/10.jpg)
5000 ohms
Connections of the body with the ECG for recording chest leads (precordial leads).
Guyton Figure 11-8. Copyright 2000, WB Saunders Company, All Rights Reserved
![Page 11: Chapter 11 The Normal Electrocardiogram Rhythmical ... · PDF fileConnections of the body with the ECG for recording unipolar augmented leads. aVR aVL aVF Recordings between one limb](https://reader033.vdocuments.mx/reader033/viewer/2022042708/5a7921777f8b9a7b548d5d7e/html5/thumbnails/11.jpg)
Normal ECGs recorded from the six standard chest leads
Guyton Figure 11-9. Copyright 2000, WB Saunders Company, All Rights Reserved
![Page 12: Chapter 11 The Normal Electrocardiogram Rhythmical ... · PDF fileConnections of the body with the ECG for recording unipolar augmented leads. aVR aVL aVF Recordings between one limb](https://reader033.vdocuments.mx/reader033/viewer/2022042708/5a7921777f8b9a7b548d5d7e/html5/thumbnails/12.jpg)
Connections of the body with the ECG for recording unipolar augmented leads.
aVR aVL
aVF
Recordings between one limb and the other two limbs.
![Page 13: Chapter 11 The Normal Electrocardiogram Rhythmical ... · PDF fileConnections of the body with the ECG for recording unipolar augmented leads. aVR aVL aVF Recordings between one limb](https://reader033.vdocuments.mx/reader033/viewer/2022042708/5a7921777f8b9a7b548d5d7e/html5/thumbnails/13.jpg)
Normal ECGs recorded from the three augmented unipolar limb leads.
Recordings between one limb and the other two limbs.
Guyton Figure 11-10. Copyright 2000, WB Saunders Company, All Rights Reserved