Early Effects of Long-Term Neurotoxic Lead Exposure in Copper Works Employees
Figure 2
Absolute sinus arrhythmia (SAa) versus heart rate () in lead-exposed subjects (E) and controls (C) at the three stages of rest, “memory span for numbers” test, and recovery (vegetative pattern) as well as SAa differentials between rest and recovery in the two subgroups of high-exposed (hE) and low-exposed (lE) subjects.
