Certified Cardiograph Technician
{CCT} - ECG Techniques and
Recognition 1 Exam
Questions With Reviewed Correct
Detailed Answers
{With Clear Images}
P wave
-First phase of cardiac cycle.
-Corresponds to the wave of depolarization that spreads from the SA node to the
atria, representing activation of the atria.
-Normal length is 0.08 to 0.1 seconds in duration.
-Appearance is smooth and round.
-Absence may suggest certain arrhythmias.
Q wave
-Seen as a negative wave on an ECG marking the beginning of the QRS complex.
-Normal duration is small, but the actual value will depend on which lead is used
to measure the wave in an ECG.
-However, this value may often be <0.03 seconds.
-An enlarged wave suggest abnormal conduction in the ventricles or a myocardial
infarction.
, R wave and S wave
- The __ wave is a positive wave on an ECG and is the predominant portion of the
QRS complex.
-May or may not precede a Q wave.
-R' is termed for a second positive wave following the __ wave.
-__ wave is a negative wave that follows the __ wave in the QRS complex seen on
an ECG.
-Together the QRS waves represent ventricular depolarization.
T wave
-Positive wave following the S wave on an ECG.
-Represent ventricular repolarization, or recovery of the ventricle.
-Final major wave of the cardiac cycle sen on an ECG.
-Longer than QRS complex, indication that repolarization takes longer than
depolarization during the cardiac cycle.
-Smoot and round, similar in shape to the P wave.
_abnormal waves may indicate heart disease or electrolyte imbalances.
U wave
-Follows the T wave.
-Still represents the final repolarization of the ventricles.
{CCT} - ECG Techniques and
Recognition 1 Exam
Questions With Reviewed Correct
Detailed Answers
{With Clear Images}
P wave
-First phase of cardiac cycle.
-Corresponds to the wave of depolarization that spreads from the SA node to the
atria, representing activation of the atria.
-Normal length is 0.08 to 0.1 seconds in duration.
-Appearance is smooth and round.
-Absence may suggest certain arrhythmias.
Q wave
-Seen as a negative wave on an ECG marking the beginning of the QRS complex.
-Normal duration is small, but the actual value will depend on which lead is used
to measure the wave in an ECG.
-However, this value may often be <0.03 seconds.
-An enlarged wave suggest abnormal conduction in the ventricles or a myocardial
infarction.
, R wave and S wave
- The __ wave is a positive wave on an ECG and is the predominant portion of the
QRS complex.
-May or may not precede a Q wave.
-R' is termed for a second positive wave following the __ wave.
-__ wave is a negative wave that follows the __ wave in the QRS complex seen on
an ECG.
-Together the QRS waves represent ventricular depolarization.
T wave
-Positive wave following the S wave on an ECG.
-Represent ventricular repolarization, or recovery of the ventricle.
-Final major wave of the cardiac cycle sen on an ECG.
-Longer than QRS complex, indication that repolarization takes longer than
depolarization during the cardiac cycle.
-Smoot and round, similar in shape to the P wave.
_abnormal waves may indicate heart disease or electrolyte imbalances.
U wave
-Follows the T wave.
-Still represents the final repolarization of the ventricles.
