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Cardiovascular toxicities upon manganese exposure Jiang Y; Zheng WCardiovasc Toxicol 2005[Fal]; 5 (4): 345-54Manganese (Mn)-induced Parkinsonism has been well documented; however, little attention has been devoted to Mn-induced cardiovascular dysfunction. This review summarizes literature data from both animal and human studies on Mn's effect on cardiovascular function. Clinical and epidemiological evidence suggests that the incidence of abnormal electrocardiogram (ECG) is significantly higher in Mn-exposed workers than that in the control subjects. The main types of abnormal ECG include sinus tachycardia, sinus bradycardia, sinus arrhythmia, sinister megacardia, and ST-T changes. The accelerated heart-beat and shortened P-R interval appear to be more prominent in female exposed workers than in their male counterparts. Mn-exposed workers display a mean diastolic blood pressure that is significantly lower than that of the control subjects, especially in the young and female exposed workers. Animal studies indicate that Mn is capable of quickly accumulating in heart tissue, resulting in acute or subacute cardiovascular disorders, such as acute cardiodepression and hypotension. These toxic outcomes appear to be associated with Mn-induced mitochondrial damage and interaction with the calcium channel in the cardiovascular system.|Animals[MESH]|Animals, Laboratory[MESH]|Blood Pressure/drug effects[MESH]|Cardiovascular Diseases/*chemically induced/physiopathology[MESH]|Electrocardiography[MESH]|Female[MESH]|Humans[MESH]|Male[MESH]|Manganese/*toxicity[MESH]|Occupational Exposure/*adverse effects[MESH]|Rats[MESH] |
