EKG/ECG Competency Exam UPDATED ACTUAL Questions and CORRECT Answers

EKG/ECG Competency Exam UPDATED
ACTUAL Questions and CORRECT
Answers
Electrocardiograph - CORRECT ANSWER - Amplifier
Sensor
Recorder


Electrocardiograph measures - CORRECT ANSWER - Voltage and Time



Small square on EKG paper - CORRECT ANSWER - 1mm or 0.04 seconds



Normal paper speed - CORRECT ANSWER - 25mm/second
Faster - stretches
Slower - compresses


Sensitivity - CORRECT ANSWER - Controls gain of amplification



Normal Sensitivity Setting - CORRECT ANSWER -1



Sensitivity turned down - CORRECT ANSWER - Cardiac action at half it's normal
amplitude
(Waves half as tall)


Sensitivity increased - CORRECT ANSWER - Cardiac action at twice it's normal
amplitude
(Waves twice as tall)

, Calibration check - CORRECT ANSWER - Done automatically prior to EKG tracing.



Standardization mark - CORRECT ANSWER - Produced by EKG when it does a
calibration check.


Universal Standard for calibration - CORRECT ANSWER - 1 millivolt = 10mm
1 millivolt electrical activity = stylus deflected 10mm high


Depolarization - CORRECT ANSWER - Contraction Phase
Discharge of electrical energy in the heart


Repolarization - CORRECT ANSWER - Recovery Phase
Heart muscle cell's electrically resets itself, or returns to it's polarized state.


Lead I - CORRECT ANSWER - Between RA to LA



Lead II - CORRECT ANSWER - Between RA to LL



Lead III - CORRECT ANSWER - Between LA to LL



aVR - CORRECT ANSWER - RA and halfway between LA and LL



aVL - CORRECT ANSWER - LA and halfway between RA and LL



aVF - CORRECT ANSWER - LL and halfway between RA and LA



Somatic or Muscle Artifact "Somatic Tremor" - CORRECT ANSWER - Erratic amplitude
and frequency