Final answer:
An education seminar on "Eating for a Healthy Heart" represents a primary prevention activity a nurse can do to improve heart health in the community, as it addresses risk factors like poor diet before heart disease occurs.
Step-by-step explanation:
To improve heart health in the community, a nurse can engage in primary prevention activities. The option that represents a primary prevention activity is (4) an education seminar on "Eating for a Healthy Heart." Primary prevention aims to prevent diseases before they occur, and by educating the public on healthy eating, the nurse is addressing modifiable risk factors such as poor diet, which is associated with cardiovascular diseases. Key risk factors for heart disease include high blood pressure, smoking, diabetes, lack of exercise, obesity, high cholesterol, poor diet, depression, and excessive alcohol consumption. An education seminar on heart-healthy eating habits can empower individuals to make healthier food choices, effectively tackling several risk factors simultaneously.
An electrocardiogram (EKG) screening, blood pressure screening, and cardiac surgical procedures are important tools in diagnosing and managing existing heart conditions, but they do not constitute primary prevention activities. While they can be part of secondary or tertiary prevention to manage or treat existing conditions, primary prevention focuses on reducing the risk of disease in healthy populations.