Heart disease is not just one "disease." And there are many ways to keep your heart and vascular system healthy by managing your weight, exercising regularly, not smoking and monitoring your blood pressure, says Dr. Elsa- Grace Giardina, Director of the Women's Health in Cardiology Center at Columbia Univ. Medical Center/Columbia Doctors. Dr. Giardina explains the differences between "cardiac arrest," "heart attack" and "heart failure," new guidelines for hypertension, and what tests you need,

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