- 1 What is the diagnosis of ECG?
- 2 What is the diagnosis of the ECG?
- 3 Which of the following is a typical AVNRT?
- 4 Types of AVNRT –
- 5 A. “Typical”, “common”, or “slow-fast” AVNRT
- 6 B. “Atypical”, “uncommon”, or “fast-slow” AVNRT
- 7 C. “slow-slow” AVNRT –
- 8 Typical AVNRT
- 9 ECG may show typical changes that confirm the diagnosis-
What is the diagnosis of ECG?
What is the diagnosis of the ECG?
A. Sinus Tachycardia
B. Atrial Fibrillation
Which of the following is a typical AVNRT?
A. Slow-Fast AVNRT
B. Fast- Slow AVNRT
C. Slow-Slow AVNRT
D. Fast-Fast AVNRT
Types of AVNRT –
A. “Typical”, “common”, or “slow-fast” AVNRT
Slow AV nodal pathway- anterograde limb of the circuit -conduct towards the ventricle
Fast AV nodal pathway – the retrograde limb – conduct to the atria
B. “Atypical”, “uncommon”, or “fast-slow” AVNRT
Fast AV nodal pathway – anterograde limb
Slow AV nodal pathway- retrograde limb .
C. “slow-slow” AVNRT –
Slow AV nodal pathway – the anterograde limb
Left atrial fibres that approach the AV node from the left side of the inter-atrial septum – retrograde limb
Anterograde conduction – via the slow pathway
Retrograde conduction -via the fast pathway
ECG may show typical changes that confirm the diagnosis-
- QRS duration <120 ms, unless a heart block is suspected
- Inverted P wave- occurs very soon after QRS complex.
- RP interval is short – less than 50% of the time between consecutive QRS complexes.
- RP interval is often so short that the inverted P waves may be buried within or seen immediately after the QRS complexes, appearing as
“pseudo R prime” wave in lead V1 or
“pseudo S” wave in the inferior leads