EKG

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Across
  1. 3. this has a depolarization of 15-40bpm
  2. 5. the trigger for myocardial contraction
  3. 7. electrical gradient just before excitation
  4. 8. the membrane returns to the normal resting potential
Down
  1. 1. depolarizes before the LA
  2. 2. a rapid change in membrane potential
  3. 4. this has a intrinsic depolarization rate of 60-100bpm
  4. 6. the direction and magnitude of an electrical current within the heart