Case 17 — Electrocardiogram (ECG)

Six limb lead ECG at 50 mm/second with calibration of 5 mm = 1 mV (not the usual 10 mm = 1 mV). The R wave height in lead II is approximately 4 mV (normal 1-2.5 mV), indicating left ventricular enlargement.
Six limb leads (50 mm/s, 5 mm = 1 mV). R wave in lead II ~4 mV (normal 1–2.5 mV).
Chest leads. Top left is V1, next down is V2, and top right is V4.
Chest leads: V1 (top left), V2 (below), V4 (top right).

Quiz

1. There is evidence of one chamber being enlarged. Which one?

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