3/20/13 1 Cardiac Conduction Physiology of Cardiac Conduction • The excitatory & electrical conduction system of the heart is responsible for the contraction and relaxation of the heart muscle. • The sinoatrial node (SA node) is the pacemaker where the electrical impulse is generated. How to Read an
4
Embed
Physiology of Cardiac Conduction Cardiac Conduction … Wave.pdf · 3/20/13 1 Cardiac Conduction Physiology of Cardiac Conduction • The excitatory & electrical conduction system
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
3/20/13
1
Cardiac Conduction
Physiology of Cardiac Conduction
• The excitatory & electrical conduction system of the heart is responsible for the contraction and relaxation of the heart muscle.
• The sinoatrial node (SA node) is the pacemaker where the electrical impulse is generated.
How to Read an
3/20/13
2
PQRST wave Deflection waves
P wave
• Lasts 0.08 s • Shows Atrial contraction
Deflection waves
QRS complex
• Results due to depolarization of ventricles • Ventricular contraction • R waves are deflected positively and the Q and S waves
are negative
T wave • Results due to ventricular decontraction (Relax)