part 1 EXTRA

Question 1

بسم الله الرحمن الرحيم توكلنا علي الحي الذي لا يموت

ECG ?

Answer 1

هو تسجيل النشاط الكهربي للقلب

وهو مجموع جهود الحركة اللي بتوصل لسطح الجسم

Question 2

U Wave ?

Answer 2

Repolarization of papillary mmuscle and purkinje fibers

Question 3

P wave

a

Answer 3

Atrial deplarzition

0,1 sec
<0,2 mv

Question 4

QRS

Answer 4

Intraventriular conduction
0,04 TO 0,08 SECODS
1mv

Porlonged in cell to cell conduction
Ventricular ectopic focus
Ventricular hypertrophy

Question 5

T wave

Answer 5

Ventricular replariztion
is gradual process compared to deplarization so that?
longer time low amplitude
0,16-0,25 seconds amplitude 0.2 mv

Question 6

pr interval ?

Answer 6

atrial and avn conductin 0,12 to 0,21 seconds

prolonged in
Vagal stimulation and AVN abnormalities

Question 7

QT Interval

Answer 7

Ventriclar electric systole ( deplarization and repolarization )

0,34to0,43 seconds

prolonged in tachycardia and shortened in bradycardia

Question 8

st and tp semetns

Answer 8

ST sements isoelectric and fully depolarized ventricles

TPsegments isoelectric fully repolarized ventricle

Question 9

Amplitude in ECG is dierct proportional to mass

Answer 9

So QRS higher than P wave

Question 10

ECG IMP

Answer 10

Anatomical orietation of Heart 
Artial and ventricualr sizes
Heart rate and regularity 
Paacemaker and the path of action potential
Muscles status

Question 11

ECG IMP IN DIAGNOSIS ?

Answer 11

Dysrhythmia
Myocardial ischemia and infarction
Electrolytes level as potassium
Digitalis effect

Question 12

why epicardium reolarize firest?

Answer 12

due to compression of contraction on subendocardial blood vessels delaying its reppolariztion

Question 13

Augmented limb lead

Answer 13

=نفسه + نص مجموع الاتنين التانيين

=واحد ونصف مثله

Question 14

المحور؟ AXIS

Answer 14

متوسط اتجاه انتشار موجة اللااستقطاب في البطين

Question 15

Normal axis degrees ?

Answer 15

-30 to +110

Question 16

Rigth axis deviation ?

Answer 16

Tall person
Right ventricular hypertrophy
Right bundle branch block
Left ventricular extrasystole

Question 17

Left axis deviation ?

Answer 17

Left ventiruclar hypertrophy
Left bundle branch block
Right ventricular extrasystole\

short

Question 18

Bipolar leads?

Answer 18

measue potential differnce betwwen 2 points by 2 active elctrodE
Lead 1 , 2 ,3

Question 19

Einthovein Law ?

Answer 19

Lead II =Lead I + Lead III

Question 20

arrythmia ?

Answer 20

مشاكل تكوين النبض

مشاكل توصيل النبض

Question 21

مشاكل تكوين النبض ؟

Answer 21

Altered impulse formation 
اختلاف
RMP
Thresold
Slope

Trigger activity
Afterdepolariaton oscillitations ! due to ischemia

Question 22

مشاكل التوصيل؟

Answer 22

1- bloclk premature beats
2-Brady cardia deceleration dependent block

1-Reduced excitability and AP Amplitude فيونكات
2-degenerative process after ischemia

Question 23

Sinus rhtym normal in

Answer 23

positive p wave in lead 2 and aVR

Heart rate 60 -100 bpm