9. Kertas grafik garis horizontal
dan vertical dengan jarak 1 mm.
Garis lebih tebal terdapat pada
setiap 5 mm.
Garis horizontal
menggambarkan waktu
1 mm = 0,04“
5mm = 0,20“.
Garis vertikal menggambarkan
voltase
1 mm = 0,1 milivolt
10 mm = 1 milivolt.
Kecepatan perekaman 25
mm/detik.
Kalibrasi 1 milivolt yang
menghasilkan defleksi setinggi
10 mm.
10.
11.
12. P wave : activation of the atria
PR interval: duration of AV
conduction
QRS complex:activation of right and
left ventricular
QRS duration: duration of ventricular
muscle depolarization
PP interval: duration of atrial cycle
(an indicator or atrial rate)
RR interval: duration of ventricular
cardiac cycle (an indicator of
ventricular rate
QT interval: duration of ventricular
depolarization and repolarization
13.
14. ECG REPORTING
1. Rhythm
2. QRS rate
3. Axis
4. P wave
5. PR interval
6. QRS complex
7. QRS duration
8. ST segment
9. T wave
10. Extra systoles
15. P wave
Width < 0.12 s
Height < 0.3 milliVolt
Always positive in lead II, negative in aVR
PR interval
From the start of P wave to the start of QRS
Normal duration 0.12 – 0.20 s
QRS complex
Width 0.06 – 0.12 s (~ 0.10 s)
Length varies among leads
Q first negative deflection
R first positive deflection
S negative deflection after R
ST segment
From the end of S to the start of T
Normal : iso-electrical
T wave
Positive in lead I, II, V3 – V6 and negative in aVR
16. ECG REPORTING
1. Rhythm
2. QRS rate
3. Axis
4. P wave
5. PR interval
6. QRS complex
7. QRS duration
8. ST segment
9. T wave
10. Extra systoles
27. ECG REPORTING
1. Rhythm
2. QRS rate
3. Axis
4. P wave
5. PR interval
6. QRS complex
7. QRS duration
8. ST segment
9. T wave
10. Extra systoles
28. Rule of 300
300/[number of large boxes between two R waves].
only works for regular rhythms !!
300/7.5 large boxes = rate 40
Six second methods
Count the number of R-R intervals in six seconds and multiply by
10
Useful for irregular rhythm average rate
There are 8 R-R intervals
within 30 boxes. Multiply 8 x
10 = Rate 80
29. ECG REPORTING
1. Rhythm
2. QRS rate
3. Axis
4. P wave
5. PR interval
6. QRS complex
7. QRS duration
8. ST segment
9. T wave
10. Extra systoles
38. ECG REPORTING
1. Rhythm
2. QRS rate
3. Axis
4. P wave
5. PR interval
6. QRS complex
7. QRS duration
8. ST segment
9. T wave
10. Extra systoles
39. Indicate wave of atrial depolarization
Normal characteristic:
1. Smooth and rounded
2. Upright in leads I, II, aVF, aVL
3. Upright or downward in lead III
4. Biphasic in right precordial lead (V1,V2)
5. P wave duration: 120 milliseconds (measured in
the widest P wave)
6. Amplitude in limb lead: < 0.25 mV and terminal
negative deflection in V1 or V2 < 0.1 mV in depth
40.
41.
42. ECG REPORTING
1. Rhythm
2. QRS rate
3. Axis
4. P wave
5. PR interval
6. QRS complex
7. QRS duration
8. ST segment
9. T wave
10. Extra systoles
43. Mulai dari awal gelombang P sampai dengan
permulaan kompleks QRS
Durassi normal 0.12-0.2 detik
44.
45.
46.
47.
48.
49. ECG REPORTING
1. Rhythm
2. QRS rate
3. Axis
4. P wave
5. PR interval
6. QRS complex
7. QRS duration
8. ST segment
9. T wave
10. Extra systoles
50. Wave of ventricular depolarization
5-20 mm tall
Duration 0.06-0.10/0.12 seconds