The rhythm which shows a normal rate, normal QRS and PRI durations, and an absent beat or beats is sinus pause.
When there are periods of three seconds or longer without atrial activity, it is called a sinus pause or arrest. This is frequently saved by an escape rhythm, which might have ventricular, junctional, or atrial origins. There is a 3 second beat pause, although this pause is normal if the time does not go beyond 3 second.
Hyperkalemia, high vagal tone, ischemic, inflammatory, or infiltrative or fibrotic illness of the SA node, as well as other conditions, can cause sinus pause. it is also known as sinus arrest, and exit block.
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Answer:
More frequent and intense drought, storms, heat waves, rising sea levels, melting glaciers and warming oceans can directly harm animals, destroy the places they live, and wreak havoc on people's livelihoods and communities. As climate change worsens, dangerous weather events are becoming more frequent or severe.
Answer:
D. changes in tools indicate changes in the toolmaker.
Explanation:
The statement that stone tools “signal the pace of change in human prehistory” means that <em>changes in tools indicate changes in the toolmaker</em>. The Stone Age is the period of human prehistory in which humans began to make stone tools. These tools can make anthropologists figure out how humans lived, what they ate and what they hunted. One of the first tools was the hammerstone which was used to break bones or to separate meat from the marrow. It was also used to make sharp tools like axes and spear-points for hunting.
Answer:
C. memories are processed the same way that a computer processes information.
Explanation:
Atkinson-Shiffrin mode is based on the belief that we process memories in the same way that computers process information.