Page 214 - Color_Atlas_of_Physiology_5th_Ed._-_A._Despopoulos_2003

A. Nomotopic impulse generation with normal conduction
A E R
SA Atria
node
Lead II f= 87min –1 AV node A E R
1s from SA node Ventricles
1 Normal sinus rhythm Distance R

Excitation (After Trautwein)
S = Spreading P Q S T
Lead II f= 140min –1 C = Complete
1s R = Retrogression
0 0.1 0.2 0.3 0.4 s
2 Sinus tachycardia Cardiac Arrhythmias
B. Heterotopic impulse generation (1–5) and disturbances of impulse conduction (5)
Sinus Retrograde atrial and SA node
ES SA node activation
Plate 8.8
R R R ES R R
Lead II
1 Nodal (AV) extrasystole (ES) Negative P
with post-extrasystolic pause T
QRS
Sinus SA node
ES ES
Isolated
ventricle activation
Lead II
1 s
2 Interpolated ventricular P T
extrasystole (ES) QRS QRS
3 Ventricular tachycardia ES ES
following extrasystole (ES)

f= 100min –1 f= 205min –1
Lead I Ventricular
tachycardia

4 Ventricular fibrillation
Lead II
5 Total AV block with ventricular R R R R R R
escape rhythm
P P (P) P P P P P P
Lead II P= 75P/min R= 45R/min 201
1s
(Partly after Riecker)
Despopoulos, Color Atlas of Physiology © 2003 Thieme
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