Chronic arsenic toxicity.

An 18-year-old man presented with palpitations and chest discomfort, and an electrocardiogram revealed supraventricular tachycardia. Further examination revealed tingling and numbness in his hands and feet, as well as hyperpigmented spots on his hands, back, and chest. Laboratory studies showed high levels of arsenic in his blood, and a diagnosis of chronic arsenic toxicity with cardiac, dermatological, and neurological manifestations was made. The patient's symptoms improved after discontinuing the homeopathic medications he had been taking. [Extracted from the article]