ECG
Where is V1 placed? - ANSWER Fourth intercostal space to the right of the
sternum
Where is V2 placed? - ANSWER 4th intercostal space to the left of the sternum
Where is V3 placed? - ANSWER Midway between V2 and V4
Where is V4 placed? - ANSWER 5th intercostal space, midclavicular line
Where is V5 placed? - ANSWER left anterior axillary line at the same horizontal
level as V4
Where is V6 placed? - ANSWER Left mid-axillary line, horizontal to V4 and V5
What is the average paper speed? - ANSWER 25 mm/sec
What does the P wave represent? - ANSWER atrial depolarization (contraction)
What does the QRS complex represent? - ANSWER ventricular depolarization and
atrial repolarization
What does the T wave represent? - ANSWER Ventricular repolarization
(ventricular relaxation)
What does the U wave represent? - ANSWER repolarization of the purkinje fibers
Normal p wave signs - ANSWER Height less than 2.5 small squares and a width
less than 3 small boxes
signs of left atrial enlargement - ANSWER P mitrale morphology and a p wave
over 3 small boxes in width
Signs of right atrial enlargement - ANSWER Height over 2.5 small boxes
What does one large box represent - ANSWER 0.2s and 0.5mV amplitude
, What does one small box represent - ANSWER 0.04s and 0.1mV amplitude
Step 1 - ANSWER Is the rhythm regular or irregular
Step 2 - ANSWER Calculate the HR
Step 3 - ANSWER Is the ventricular activity related to atrial? Is there one P wave
per QRS
Step 4 - ANSWER Is the PR interval between 0.12-0.20s
Step 5 - ANSWER Measure QRS segment 0.04-0.10s
Step 6 - ANSWER Identify t wave after QRS and ensure it is upright
Step 7 - ANSWER Note ectopic beats
Step 8 - ANSWER Determine origin
Step 9 - ANSWER Correctly identify rhythm
sinus rhythm - ANSWER SAN demonstrated by appropriate p waves
sinus rhythm ECG characteristics - ANSWER HR 60-100
p waves negative in aVR
P waves upright in lead I and II
P wave before QRS
QRS equal
Sinus Tachycardia characteristics - ANSWER HR over 100bpm
P waves upright in lead I and II
P waves negative in aVR
P wave before every QRS
QRS equal distance
Sinus Tachycardia - ANSWER SAN but HR >100
Where is V1 placed? - ANSWER Fourth intercostal space to the right of the
sternum
Where is V2 placed? - ANSWER 4th intercostal space to the left of the sternum
Where is V3 placed? - ANSWER Midway between V2 and V4
Where is V4 placed? - ANSWER 5th intercostal space, midclavicular line
Where is V5 placed? - ANSWER left anterior axillary line at the same horizontal
level as V4
Where is V6 placed? - ANSWER Left mid-axillary line, horizontal to V4 and V5
What is the average paper speed? - ANSWER 25 mm/sec
What does the P wave represent? - ANSWER atrial depolarization (contraction)
What does the QRS complex represent? - ANSWER ventricular depolarization and
atrial repolarization
What does the T wave represent? - ANSWER Ventricular repolarization
(ventricular relaxation)
What does the U wave represent? - ANSWER repolarization of the purkinje fibers
Normal p wave signs - ANSWER Height less than 2.5 small squares and a width
less than 3 small boxes
signs of left atrial enlargement - ANSWER P mitrale morphology and a p wave
over 3 small boxes in width
Signs of right atrial enlargement - ANSWER Height over 2.5 small boxes
What does one large box represent - ANSWER 0.2s and 0.5mV amplitude
, What does one small box represent - ANSWER 0.04s and 0.1mV amplitude
Step 1 - ANSWER Is the rhythm regular or irregular
Step 2 - ANSWER Calculate the HR
Step 3 - ANSWER Is the ventricular activity related to atrial? Is there one P wave
per QRS
Step 4 - ANSWER Is the PR interval between 0.12-0.20s
Step 5 - ANSWER Measure QRS segment 0.04-0.10s
Step 6 - ANSWER Identify t wave after QRS and ensure it is upright
Step 7 - ANSWER Note ectopic beats
Step 8 - ANSWER Determine origin
Step 9 - ANSWER Correctly identify rhythm
sinus rhythm - ANSWER SAN demonstrated by appropriate p waves
sinus rhythm ECG characteristics - ANSWER HR 60-100
p waves negative in aVR
P waves upright in lead I and II
P wave before QRS
QRS equal
Sinus Tachycardia characteristics - ANSWER HR over 100bpm
P waves upright in lead I and II
P waves negative in aVR
P wave before every QRS
QRS equal distance
Sinus Tachycardia - ANSWER SAN but HR >100
