To the Editor.—
Granted that recognition of electrical artifacts is imperative in the proper management of cardiac arrhythmias, especially in the setting of a coronary care unit. However, in the letter by Rubenfire and Rosenzweig (220:1130, 1972) there should have been no confusion. No self-respecting nurse in the coronary care unit would confuse those irregular waves with flutter waves; eg, in lead II, intervals varying from 0.14 to 0.20 seconds are seen. A look, and not a glance, is all that is required.