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  1. Heart disease - Symptoms and causes - Mayo Clinic

  2. The 12 most common heart and cardiovascular conditions • HRI

  3. Heart Disease: Types, Causes, and Symptoms - WebMD

  4. Heart Disease: Types, Early Signs, Symptoms, Prevention

  5. Heart Disease: Symptoms & Types - WebMD

  6. Heart Disease Symptoms & Signs of Other Heart Problems - WebMD

  7. Answers by Heart Fact Sheets: Cardiovascular Conditions

  8. Types of Heart Disease - Verywell Health

  9. Heart Disease: Symptoms & Causes - Cleveland Clinic

  10. Heart attack - Symptoms & causes - Mayo Clinic

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