Figure 3From: Inhalation of ultrafine carbon particles alters heart rate and heart rate variability in people with type 2 diabetesECG changes during longer monitoring periods. Mean ± SE change from first monitoring period (0–9 hours, which included the exposure and first few hours afterward) to subsequent 2 monitoring periods, in the ST segment of the ECG for lead 2 (A), lead V2 (B), and lead V5 (C), in subjects exposed to elemental carbon UFP (solid boxes) and filtered air (open circles). The insets show actual mean values for the 0–9 hours monitoring period.Back to article page