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ECG test
Waveform Measurements
Question | Answer |
---|---|
Each small square is equal to ______ when measuring the voltage of a waveform. | .1 mv |
The T wave signifies _______ on the electrocardiogram. | ventricular repolarization |
When measuring time each small square is equal to _______ in duration. | .04 seconds |
The QRS complex normally measures between ____ and _____ seconds long. | .06 to .12 |
The formula for calculating the heart is ________ | 1500 / # of boxes |
Atrial depolarization is represented by the _______ on the electrocardiogram. | P Wave |
One large square on the EKG paper represents_____ | .20 seconds |
The ST segment usually appears_______ | flat |
Two large squares on the EKG paper represents _____ millimeters or _____ milivolt. | 10 or 1.0 |
QRS Complex | ventricular depolarization |
The axis of a normal heart is between ____ and ____ degrees. | 0 and +90 degrees |
Ventricular contraction occurs during the ______ on the EKG | ST Segment |
Normal duration of the QT interval | .32 to .44 |
PR interval represents | depolarization of the atria and the delay of the inpulse at the AV Node. |
Duration of the PR Interval | .12 to .20 seconds |
Normal Sinus Rhythm | 60 and 100 bpm |
V1 | Fourth intercostal space at the right margin of the sternum |
V2 | Fourth intercostal space at the left margin of the sternum |
V3 | Midway between V2 and V4 |
V4 | Fifth intercostal space at the left midclavicular line |
V5 | level of V4 but on left anterior line |
V6 | level of V4 but on midaxillary line |