ECG Lead System UPDATED ACTUAL
Exam Questions and CORRECT Answers
Electrocardiogram (ECG) - CORRECT ANSWER - Since you can't see the heart beating
we use a ECG to provide a picture that replicates the actual cardiac issue.
Myocardial Infraction (MI) - CORRECT ANSWER - Heart Attack
-Have abnormal rhythms.
-Death of cardiac muscle due to ischemia
Doe the ECG machine monitor or control the hearts rhythm? - CORRECT ANSWER -
Only monitors
Straight line when machine is turned on but not connected to the patient - CORRECT
ANSWER - Isoelectric = no current
It is straight because there is a balanced electrical force field. This Isoelectric line acts as a
starting point for the patterns to be displayed
ECG Pattern - CORRECT ANSWER - Upward Pattern: electricity flowing from the heart
to the electrodes moving to the positive electrode
Downward Pattern: electricity flowing from the heart to the electrodes moving away from the
positive electrode
Where should you put electrodes ? - CORRECT ANSWER - 1. Close to bone
2. Over soft tissue
Where should you NOT put electrodes - CORRECT ANSWER - 1. Thick muscles
, 2. Skin Folds
3. Bony prominence's
they can cause ECG artifacts that take away from the reading
Leads - CORRECT ANSWER - recordings of heart activity from several angles around
the heart
(like adjusting the view for your camera)
Lead 1 - CORRECT ANSWER - right arm (-) to left arm (+)
-positive deflection of ECG tracings
-helpful in monitoring atrial rhythms and hemi blocks
Lead 11 - CORRECT ANSWER - right arm (-) to below the last left palpable rib, below
the midclavicular line(+)
-primary lead
-also positive deflection
-current travels down and to the left following normal condition system of the heart
-info about inferior portion of the heart
-useful for detecting sinus node (SA) and atrial arrhythmias
Lead 111 - CORRECT ANSWER - left arm (-) left leg (+)
-also positive deflection
-also detects changes associated with an inferior wall myocardial infraction
Exam Questions and CORRECT Answers
Electrocardiogram (ECG) - CORRECT ANSWER - Since you can't see the heart beating
we use a ECG to provide a picture that replicates the actual cardiac issue.
Myocardial Infraction (MI) - CORRECT ANSWER - Heart Attack
-Have abnormal rhythms.
-Death of cardiac muscle due to ischemia
Doe the ECG machine monitor or control the hearts rhythm? - CORRECT ANSWER -
Only monitors
Straight line when machine is turned on but not connected to the patient - CORRECT
ANSWER - Isoelectric = no current
It is straight because there is a balanced electrical force field. This Isoelectric line acts as a
starting point for the patterns to be displayed
ECG Pattern - CORRECT ANSWER - Upward Pattern: electricity flowing from the heart
to the electrodes moving to the positive electrode
Downward Pattern: electricity flowing from the heart to the electrodes moving away from the
positive electrode
Where should you put electrodes ? - CORRECT ANSWER - 1. Close to bone
2. Over soft tissue
Where should you NOT put electrodes - CORRECT ANSWER - 1. Thick muscles
, 2. Skin Folds
3. Bony prominence's
they can cause ECG artifacts that take away from the reading
Leads - CORRECT ANSWER - recordings of heart activity from several angles around
the heart
(like adjusting the view for your camera)
Lead 1 - CORRECT ANSWER - right arm (-) to left arm (+)
-positive deflection of ECG tracings
-helpful in monitoring atrial rhythms and hemi blocks
Lead 11 - CORRECT ANSWER - right arm (-) to below the last left palpable rib, below
the midclavicular line(+)
-primary lead
-also positive deflection
-current travels down and to the left following normal condition system of the heart
-info about inferior portion of the heart
-useful for detecting sinus node (SA) and atrial arrhythmias
Lead 111 - CORRECT ANSWER - left arm (-) left leg (+)
-also positive deflection
-also detects changes associated with an inferior wall myocardial infraction
