Practice Quiz

NREMT Advanced EMT Practice Test #4

Category - EMT-I/99

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What is the proper term for one heart contraction?
  1. Stroke limit
  2. Stroke weight
  3. Stroke volume
  4. Stroke rate
Explanation
Answer - C - The proper term for one heart contraction is stroke volume. Stroke volume is determined by preload, afterload, and contractile force. The greater volume of the preload is, the more the ventricles are stretched. The greater the ventricles stretch, up to a certain point, the greater the subsequent cardiac contractions. This is referred to as Starling’s law of the heart.
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