title: A transparent overlay for assessing amplitude of ECG wave forms.
abstract: The amplitude of ECG wave forms can be evaluated rapidly and accurately with the help of a transparent overlay depicting images of the P-QRS-T complex in various leads. Such images are drawn between the upper and lower limits of normal amplitude values and by placing them over the corresponding P-QRS-T complexes in the patient's record it is possible to determine in a matter of seconds whether various deflections are within normal limits.
mesh_terms: D000328:Adult; D004562:Electrocardiography / Q000295:instrumentation*; D006801:Humans