ECG Case 093

NOTE:

Rate:

• ~310
• As 50 mm/s Rate = number of big squares between R-R complex divided into 600 (or)
• As 50 mm/s Rate = number of small squares between R-R complex divided into 3000

Rhythm:

• Regular
• Nil P Waves Visible

Axis:

Intervals:

• PR – Nil p waves visible
• QRS – Narrow (40ms)
• QT – 140ms

Additional/Segment:

• Incomplete precordial Leads Limit Interpretation

Interpretation:

• Narrow Complex Tachycardia / SVT

Causes

• ~50% of Paediatric SVTs have no underlying heart disease
• Can be secondary to fever & drugs
• ~25% of Paediatric SVTs have congenital heart disease
• ~25% of Paediatric SVTs have WPW

Below is an ECG taken on the same patient at standard calibration (25mm/s)