Fig. 2From: Bilateral blindness secondary to optic nerve ischemia from severe amlodipine overdose: a case reportA 12-lead electrocardiogram demonstrating features of hypokalemia including increased amplitude and width of the P-waves, T-wave flattening and inversion, ST depression, and prominent U wave formation best seen in the precordial leads. Apparent QTc prolongation is observed due to fusion of the T and U waves. BPM breaths per minute, ECG electrocardiogramBack to article page