A nurse is providing discharge instructions to a client who developed deep-vein thrombosis (DVT) postoperatively and is prescribed anticoagulant therapy. Which of the following instructions should the nurse include?

A. The pain persists with rest and organic nitrates: This statement is incorrect. Anginal pain typically improves with rest and can be relieved by the administration of organic nitrates.

B. The pain usually lasts longer than 20 min: This statement is incorrect. Anginal pain is often brief and lasts for a few minutes, typically less than 20 minutes.

C. Exertion and anxiety can trigger the pain: This is the correct answer. Anginal pain is often triggered by activities that increase the workload of the heart, such as exertion or emotional stress (anxiety). These triggers lead to an increased demand for oxygen by the heart muscle, which may exceed the compromised blood supply, resulting in angina.

D. The pain often radiates to the jaw or the back: This statement is correct. Anginal pain may radiate to the jaw, back, shoulder, arm, or neck. The radiation of pain is a characteristic feature of angina.

A. "These tests help determine the degree of damage to the heart tissues." - This is the correct statement. Cardiac enzyme studies, such as creatine kinase (CK), CK-MB, troponin I, and troponin T, are used to assess the extent of myocardial damage during an acute myocardial infarction (MI). Elevated levels of these enzymes indicate myocardial injury and help healthcare providers determine the severity of the heart tissue damage.

B. "Cardiac enzymes will identify the location of the MI." - While cardiac enzymes can confirm the presence of an MI, they do not specifically identify the location of the infarction. Other diagnostic tools, such as electrocardiogram (ECG) and imaging studies, may help determine the location of the MI.

C. "Cardiac enzymes assist in diagnosing the presence of pulmonary congestion." - Cardiac enzymes are not used to diagnose pulmonary congestion. Other diagnostic methods, such as chest X-rays and physical examination, are more appropriate for assessing pulmonary congestion.

D. "These tests will enable the provider to determine the heart structure and mobility of the heart valves." - Cardiac enzyme studies do not provide information about the overall heart structure or the mobility of heart valves. Imaging studies, such as echocardiography, are used for this purpose.