The Heartbeat

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