IgE is found in all humans, and they are located in the lungs, skin, and mucous membranes. They target foreign bodies such as pollen, fungus spores, and animal dander, and they help the body to react by detecting their presence. People with allergies tend to have a higher amount of IgE in their bodies.
Supraventricular tachycardia is a series of rapid heartbeats that begin in or involve the upper chambers (atria) of the heart. SVT can cause the heart to beat very rapidly or erratically. As a result, the heart may beat inefficiently, and the body may receive an inadequate blood supply.
Sinus tachycardia is the most common regular SVT. It has an accelerated sinus rate that is a physiologic response to a stressor. It is characterized by a heart rate faster than 100 beats per minute (bpm) and generally involves a regular rhythm with p waves before all QRS complexes.