Question

230 ECGS MADE EASY WAL Figure 8-17 Atrial pacing? Paced interval Ventricular pacing? Identification Shahhhhhhhhhhhh Figure B-18 Ventricular pacing? Atrial pacing? Paced interval Identification Figure 8-19 Atrial pacing? Paced interval _Ventricular pacing? Identification

Answer 1

P wave indicates atrial systole or contraction

QRS complex indicates ventricular systole or contraction

Atrial pacing indicates the distance between two p waves while ventricular pacing indicates the distance between two QRS complex.

If pacing interval is regular is equal distance is maintained between the waves otherwise it is considered as irregular.

Fig 1

Atrial pacing- Irregular, SA node is firing at an irregular rate

Ventricular pacing- Regular

Pacing interval- Irregularly regular

Identification- Abnormal conduction, SA node firing at an irregular rate but the conduction through Av node is regular

Fig 2

Atrial pacing- regular, SA node is firing at a regular interval

Ventricular pacing- regular, current is passed at the regular interval through AV node

Pacing interval- regular

Identification- Normal atrial and ventricular function.

Fig 3

Atrial pacing- absent

Ventricular pacing- present at regular interval

Pacing interval- regular

Identification- normal ventricular function.