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- ... abnormal rhythm (arrhythmia) called an atrioventricular (AV) block. P waves show that the top of the heart received electrical activity. Each P wave is usually followed by the tall (QRS) ...
- Arsenic and Drinking Water (U.S. Geological Survey)Arsenic/Learn More ... Arsenic ... Drinking Water/Images ... Drinking Water ... U.S. Geological Survey ... Arsenic is a naturally occurring element, but long-term exposure can ...
- Flashes and Floaters (VisualDX)Eye Diseases/Images ... Eye Diseases ... Retinal Detachment/Images ... Retinal Detachment ... Retinal Disorders/Images ... Retinal Disorders ... VisualDX ... Discover the causes, symptoms, ...
- Before and After Photos: Treatment of Hypertrophic Scars (American Society for Dermatologic Surgery)Scars/Images ... Scars ... American Society for Dermatologic Surgery ... Acne scars are usually the result of inflamed blemishes caused by skin pores engorged with excess ...
- Shingles (Zoster) (VisualDX)Shingles/Images ... Shingles ... VisualDX ... Shingles (zoster) is a painful rash caused by the varicella-zoster virus, the same virus that causes chickenpox. After a ...