Case 18 — Electrocardiogram

ECG at 50 mm/sec, 1 cm = 1 mV. No P waves. Rate ~120 bpm. Regular rhythm. Terminal left axis deviation. Consistent with atrial standstill.
ECG (50 mm/s, 1 cm = 1 mV). No P waves; ~120 bpm; regular rhythm; terminal left axis deviation.

Quiz

1. What is the approximate heart rate?

2. What is the rhythm?

3. What electrolyte should you check next?

4. The terminal QRS deflection is oriented:

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