1. Dr Sing Khien Tiong GPST1
Arrhythmias
Dr Sing Khien Tiong
GPST1

2. AF
Irregular ventricular response.
No evidence of organised atrial activity.
Fine fibrillatory waves seen in V1.

3. Atrial Flutter with 2:1 Block 
There are inverted flutter waves in II, III + aVF at a rate of 300 bpm (one per big square)
There are upright flutter waves in V1 simulating P waves
There is a 2:1 AV block resulting in a ventricular rate of 150 bpm
Note the occasional irregularity, with a 3:1 cycle seen in V1-3

4. Sinus brady

5. WPW
Can be:
Short PR interval
Slurring upstroke QRS complex
Widened QRS complex

6. VT
Broad complex

7. RBBB
rsr

8. Complete Heart Block

9. 1st degree heart block

10. 2:1 type 2 heart block

11. LBBB
Broad notched or slurred R wave in leads I, aVL, V5, and V6 and an occasional RS pattern in V5 and V6 attributed to displaced transition of QRS complex.

12. SVT

13. Wenckebach ECG (Type 1)
The increase in PR interval from one complex to the next is subtle. However, the difference is more obvious if you compare the first PR interval in the cycle to the last.
 The P-P interval is relatively constant despite the irregularity of the QRS complexes.

14. Sinus rhythm with inverted T waves, prominent U waves and a long Q-U interval due to severe hypokalaemia (K+ 1.7)
A premature atrial complex (beat #9 of the rhythm strip) lands on the end of the T wave, causing ‘R on T’ phenomenon and initiating a paroxysm of polymorphic VT.
Because of the preceding long QU interval, this can be diagnosed as TdP.

15. NSR