The part of the graph that represents ventricular contraction is QRS complex, option D
What is QRS complex?
The QRS complex represents the ventricular depolarization, which is the electrical event that triggers the contraction of the ventricles. The ventricles are the lower chambers of the heart that are responsible for pumping blood out to the body.
P wave: Represents the atrial depolarization, which is the electrical event that triggers the contraction of the atria. The atria are the upper chambers of the heart that are responsible for filling the ventricles with blood.
PR interval: Represents the time it takes for the electrical signal to travel from the atria to the ventricles.
QRS complex: Represents the ventricular depolarization.
ST segment: Represents the time it takes for the ventricles to repolarize, which is the electrical event that relaxes the ventricles.
T wave: Represents the repolarization of the ventricles.
So, to summarize, the QRS complex is the part of the ECG that represents the ventricular contraction.
Complete question:
in a recording of an ekg, which part of the graph represents ventricular contraction?
group of answer choices
qt interval
st segment
pr segment
qrs complex
pr interval