This interval represents the time required for the electrical impulse to leave the SA node and travel through the atria
What is the PR Interval?
100
The first deflection of the cardiac cycle caused by depolarization
What is the P-Wave?
100
A hollow four-chambered muscle organ which lies in the mediastinal cavity between the right and left lungs, just behind the sternum
What is the heart?
100
The electrical impulses are formed in the sinoatrial (SA) node and discharged regularly at a rate of 60-100 times per minute
What is normal sinus rhythm?
100
The ability of the cell to spontaneously generate and discharge an electrical impulse
What is Automaticity?
200
This represents the end of ventricular depolarization and the beginning of the ventricular repolarization
What is ST Segment?
200
This represents the time required for the electrical impulse to depolarize the ventricles
What is QRS complex?
200
The two upper chambers left and right separated by the interatrial septum
What are the atriums?
200
This originates in the SA node and discharges impulses regularly at a rate between 100-160 times per minute
What is Sinus Tachycardia?
200
The ability of the cell to respond to an electrical impulse
What is excitability?
300
This represents the time between the onset of ventricular depolarization and the end of ventricular repolarization
What is QT Interval?
300
This represents the latter phase of the ventricular repolarization
What is the T-Wave?
300
the two lower chambers, left and right, responsible for pumping blood throughout the body
What are the ventricles?
300
This originates in the SA node and discharges impulses regularly at a rate between 40-60 times per minute.
What is Sinus Bradycardia?
300
The ability of the cell to transmit an electrical impulse from one cell to another
What is conductivity?
400
This interval indicates the ventricular repolarization time has slowed
What is prolonged QT?
400
This represents a part of the latter phase of ventricular repolarization. It is a small deflection seen after the T wave
What is the U wave?
400
Tricusip, pulmonic, mitral, aortic
What are heart valves?
400
This originates in the sinus node and discharges impulses irregularly. Heart rate may be normal 60-100 beats per minute
What is Sinus Arrhythmia?
400
The ability of the cell to shorten and lengthen its muscle fibers
What is contractility?
500
This EKG segment shows signs of myocardial injury, as seen in acute myocardial infacrtion
What is ST elevation?
500
This point is the junction between the QRS and ST segment
What is the J point?
500
The AV valves are forced shut during this ventricular contraction
What is systole?
500
This originates in the sinus node and are characterized by a pause in the sinus rhythm in which one or more beats are missing. This is caused by failure of SA node to fire