Introduction to Climate change. Many people make Climate Change and Global Warming a scary and difficult thing to understand, but itâs not.Scientists have warned that the world's climate has changed a lot, and has affected many living and non-living things.ntroduction to Climate change. Many people make Climate Change and Global Warming a scary and difficult thing to understand, but itâs not.
Atrial or Supraventricular Tachycardia (SVT) Atrial or Supraventricular tachycardia (SVT) is a fast heart rate that starts in the upper chambers of the heart. Some forms are called paroxysmal atrial tachycardia (PAT) or paroxysmal supraventricular tachycardia (PSVT). How it happens.
Symptoms of SVT. Typically, SVT occurs in discrete episodes, which most often begin suddenly and stop suddenly. The duration of episodes can be from a few seconds to several hours. During an episode of SVT, the heart rate is at least 100 beats per minute, but in some people can become substantially faster than 200 beats per minute. SVT commonly produces palpitations - a feeling of having extra heart beats or of a racing heart, which can be quite scary.