Which instruction should a nurse provide a client with a history of rheumatic fever before the client has any dental work done?

Choice A rationale

Morphine is the drug of choice after the initial phase of an MI to manage pain that is unresponsive to nitroglycerin. It acts as an opioid analgesic and provides significant peripheral vasodilation, which reduces both preload and afterload, thereby decreasing myocardial oxygen demand. Furthermore, morphine has a calming effect on the central nervous system, effectively reducing the intense anxiety and sympathetic nervous system activation that can further strain an injured heart during the recovery phase.

Choice B rationale

Aspirin is an antiplatelet medication that is administered immediately upon suspicion of a myocardial infarction to prevent the further growth of a coronary thrombus. It is considered part of the initial acute management phase rather than a medication used specifically for the ongoing management of pain and anxiety. While it is essential for long-term secondary prevention, its primary mechanism of action is hematological and does not provide any analgesic or sedative benefits for the patient.

Choice C rationale

Oxygen therapy is indicated in the early stages of a myocardial infarction if the patient's oxygen saturation falls below 90 percent or if they are in respiratory distress. The goal is to increase the oxygen supply to the ischemic myocardial tissue. However, oxygen is a gas used to support oxygenation and is not a pharmacological agent for pain relief or anxiety. Recent guidelines suggest avoiding routine supplemental oxygen in non-hypoxic patients as it may cause vasoconstriction.

Choice D rationale

Nitroglycerin is a potent vasodilator used in the initial acute phase to relieve chest pain by improving coronary artery blood flow and reducing myocardial workload. While it is excellent for managing ischemic pain, it does not address the psychological anxiety or the severe, persistent pain that often follows a major infarction. Once the initial vessel dilation is achieved, morphine is often required to manage the remaining discomfort and the patient's heightened emotional and physiological stress response.

Choice A rationale

Glucocorticoids like steroids are primarily utilized to suppress active inflammatory processes during acute rheumatic fever episodes rather than serving as a preventive measure for dental procedures. While they reduce systemic inflammation and carditis severity, they do not provide the necessary antimicrobial coverage required to prevent bacterial seeding of damaged heart valves during invasive oral maneuvers. Administering them before dental work would not address the specific risk of bacteremia-induced endocarditis effectively in this client population.

Choice B rationale

Aspirin is a nonsteroidal anti-inflammatory drug used during the acute phase of rheumatic fever to manage joint pain and reduce fever through prostaglandin inhibition. However, aspirin lacks the antibacterial properties required to prevent subacute bacterial endocarditis. Furthermore, its antiplatelet effect might actually increase the risk of bleeding during dental extractions or deep scaling without offering any protection against the pathogens commonly introduced into the bloodstream from the oral cavity during such procedures.

Choice C rationale

Advising a client to avoid all activity is unnecessary and does not address the physiological risk associated with dental work in a patient with a history of rheumatic fever. Activity restriction is usually reserved for the acute phase of the illness to minimize cardiac demand if carditis is present. For a stable client undergoing dental work, the primary concern is the entry of oral bacteria into the circulation, which physical rest cannot prevent or mitigate.

Choice D rationale

Rheumatic fever often causes permanent damage to heart valves, creating a site where bacteria can easily adhere. Dental procedures can introduce oral flora, such as Streptococcus viridans, into the bloodstream. Prophylactic antibiotics are administered to eliminate these bacteria before they can colonize the endocardium or damaged valves. This prevention strategy is the standard of care for high-risk patients to avoid the development of life-threatening infective endocarditis following invasive dental manipulations.