The Heartbeat

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Across
  1. 2. what is the abbreviation of this node?
  2. 3. shows stimulation(contraction/depolarization) of the ventricles
  3. 6. recovery(relaxation) of the ventricles
  4. 7. Heartbeat rate?
  5. 8. due to stimulation(contraction) of the atria
Down
  1. 1. basic rhythm and rate of the heartbeat?
  2. 4. what ventricle pumps blood into the pulmonary artery, then into the lungs?
  3. 5. What is the prefix of heartbeat? (medical terminology)