ECG #43

DESCRIPTION:

• Narrow complex (QRS duration 46 ms) tachycardia (ventricular rate 313 bpm)
• No obvious P-waves
• Rightward QRS axis (130°)
• ST-segment depression throughout the precordial leads
• T-wave inversion in the inferior leads (II, III, aVF)

INTERPRETATION:

Supraventricular tachycardia

CASE RESOLUTION:

• Initial application of ice packs to the face failed to terminate the SVT.
• Restitution of normal sinus rhythm following the second dose of intravenous adenosine.