Cardiovascular system

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Across
  1. 4. Drug that inhibits platelet aggregation (10 letters)
  2. 5. Beta-blocker commonly used in hypertension (7 letters)
  3. 6. Class of drugs that block calcium channels (3 letters)
  4. 8. Ion that plays a key role in cardiac action potential (7 letters)
Down
  1. 1. Common nitrate used to treat angina (10 letters)
  2. 2. Drug class that increases urine output (8 letters)
  3. 3. Class of drugs that reduce cholesterol (12 letters)
  4. 7. Enzyme inhibited by statins (3 letters)
  5. 9. Class of drugs that lower blood pressure by blocking angiotensin II (3 letters)