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Middle stage of diastole during cycle of heart beat, where initial passive filling of the heart's ventricles has slowed down, but before the atria contract to complete the filling
What is the Wigger's diagram good for showing?
That the electrical activity (recorded on an EKG) actually occurs well before mechanical contraction of atria and ventricles
Atrial contraction begins where on EKG? and continues to where?
Begins in the middle of the P wave and continues throughout the PR interval
When does atrial muscle relaxation occur?
After the QRS complex and is accompanied by a decrease in atrial pressure
On EKG, where does ventricular contraction occur?
Peak of QRS complex and continues during the ST segment and T wave
When does the MV close on an EKG?
Peak of QRS complex (due to an increase in ventricular pressure as ventricles contract)
On EKG, when does the mitral valve open?
0.05 seconds after end of T wave (this is the end of isovolumic relaxation)
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