While changing the dressing of a client who is immobile, the nurse notices the boundary of the wound has increased. Given there is a positive methicillin-resistant Staphylococcus aureus (MRSA), which is the most important action for the nurse to take?

A. Elevated energy level: While cocaine use can initially cause increased energy, this is a temporary effect. The most consistent and concerning behavioral manifestation is drug-seeking behavior due to intense cravings.
B. Powerful craving for more: Cocaine is highly addictive and stimulates the brain's reward system, leading to a powerful and often uncontrollable craving for more of the drug, which is a hallmark of cocaine dependence.
C. High self-esteem: Cocaine use may cause temporary grandiosity, but it does not result in true or stable high self-esteem. Users often experience mood swings and depressive symptoms after the drug wears off.
D. Euphoria: Cocaine does cause euphoria, but it is short-lived. The craving for more, even after the initial high, is more defining and persistent in clients who test positive and are in the cycle of use.

Troponin I and CK-MB are cardiac enzymes that are released into the bloodstream when the heart muscle is injured or necrotic. Elevated levels of these enzymes indicate that the client has suffered a myocardial infarction (MI) or heart atack. The damaged heart tissue can impair the electrical conduction system of the heart and cause abnormal heart rhythms or dysrhythmias, which can be life-threatening. The PN should monitor the client's cardiac status closely and report any changes to the charge nurse.

The other options are not correct because:

1. The client is not at risk for pulmonary embolism, which is a blockage of a pulmonary artery by a blood clot or other material. Pulmonary embolism does not cause elevated cardiac enzymes, but it can cause chest pain, shortness of breath, and hypoxia.
2. The client is not at risk for recurrent long-term angina pain, which is chest pain caused by reduced blood flow to the heart muscle due to narrowed or blocked coronary arteries. Angina pain does not cause elevated cardiac enzymes, but it can be a warning sign of an impending MI.
3. The lab results do not indicate risk factors for transient ischemic atack (TIA), which is a temporary interruption of blood flow to a part of the brain due to a clot or plaque. TIA does not cause elevated cardiac enzymes, but it can cause neurological symptoms such as weakness, numbness, or speech difficulties.