ECG

Question 1

intrinsic rate of

1-SA Node - Dominant

2-AV Node - Back-up

3-Ventricular cells - Back- up

Answer 1

1-60 to100 b/m

2-40 to 60 b/m

3-20 to 45 b/m

Question 2

Leads TERRITORIES
Anterior:

Inferior:

Lateral:

Answer 2

Anterior: 1v,2v,3v,4v

Inferior: ||,|||,avF

Lateral:|,avL,5v,6v

Question 3

The standard EKG has ………? leads:

Answer 3

12 leads:
• 3 Standard Limb Leads
• 3 Augmented Limb Leads
• 6 Precordial Leads

Question 4

P WAVE

1-Always negative in lead …

2-Always positive in lead … and …

3-Commonly biphasic in lead …

4-Best seen in leads…

5- < … …small squares in duration

6- < ……small squares in amplitude and if it more the diagnosis will be ……

Answer 4

P WAVE

1-Always negative in lead aVR

2-Always positive in lead I and II

3-Commonly biphasic in lead V1

4-Best seen in leads II

5- < 3 small squares in duration

6- < 2.5 small squares in amplitude - RIGHT ATRIAL ENLARGEMENT

Question 5

ST SEGMENT

1-Elevation or depression of ST segment by …
mm or more

2- “J” (Junction) point is the point between ……
and …… segment

3-the common cause of ST elevation in a 12 leads ECG is …………

Answer 5

ST SEGMENT

1-Elevation or depression of ST segment by 1
mm or more

2- “J” (Junction) point is the point between QRS and ST segment

3-the common cause of ST elevation in a 12 leads ECG is Left ventricular hypertrophy.

Question 6

How you could calculate heart rate ?

1-regular

2-irregular

Answer 6

How you could calculate heart rate ?

1-regular “1)300 2)150 3)100 4)75 5)60 6)50 rule! “

2-irregular “R wave # X 6”

Question 7

Important

PR: … to… ms

QRS: < … ms

QT:
male < … ms

Female < … ms

Answer 7

PR: 120 to 200 ms

QRS: < 120 ms

QT:
male < 440 ms

Female < 460 ms