The client is scheduled to receive 30 grams of lactulose orally every 12 hours. An oral solution containing 5 g/10 mL is available. How many mL should be poured into the medication cup to administer the required dose?

Choice A reason: Anorexia, or loss of appetite, is not typically a direct manifestation of left-sided heart failure. While it can be associated with many medical conditions and may occur in the context of heart failure due to overall decreased well-being, it is not a specific indicator of left-sided heart failure.

Choice B reason: Weight gain can be associated with heart failure, but it is more commonly a sign of right-sided heart failure, where fluid accumulates in the body tissues, causing swelling and weight increase. In left-sided heart failure, weight gain is not as prominent because the primary issue is the backup of blood into the lungs, not fluid retention in the tissues.

Choice C reason: A distended abdomen can occur in heart failure due to fluid accumulation; however, it is more characteristic of right-sided heart failure, where the failure of the right ventricle leads to systemic congestion, including the abdominal area. In left-sided heart failure, the primary effect is on the lungs, not the abdomen.

Choice D reason: Dyspnea, or difficulty breathing, is a hallmark symptom of left-sided heart failure. It occurs due to the backup of blood in the pulmonary circulation, which leads to pulmonary congestion and reduced oxygen exchange. Patients may experience shortness of breath, especially during exertion or when lying flat (orthopnea), and may wake up at night with shortness of breath (paroxysmal nocturnal dyspnea).

Left-sided heart failure, often caused by conditions like valvular heart disease, leads to a decrease in the heart’s ability to pump blood effectively. This results in a buildup of pressure in the lungs, manifesting as dyspnea, which is an important symptom for nurses and other healthcare providers to recognize and manage promptly.

Choice A reason: Myocardial infarction (MI) is not limited to occurrences with exertion. While stable angina typically occurs during physical activity or emotional stress, MI can happen at any time, even at rest. The underlying cause of an MI is the complete blockage of blood supply to a part of the heart muscle, usually due to a blood clot in a coronary artery. This blockage can lead to the death of heart muscle tissue, a condition that requires immediate medical attention.

Choice B reason: Stable angina does not typically last for more than 30 minutes. It is characterized by chest pain or discomfort that occurs predictably with exertion or emotional stress and is relieved within minutes by rest or nitroglycerin. In contrast, the pain from an MI is more prolonged and severe, and it is not relieved by rest or nitroglycerin. If chest discomfort lasts longer than 15 minutes and is not alleviated by rest or nitroglycerin, it is a warning sign that the individual may be experiencing an MI.

Choice C reason: This is the distinguishing feature between stable angina and an MI. Stable angina is usually relieved within 3-5 minutes by rest or nitroglycerin, which helps to dilate the coronary arteries and improve blood flow to the heart muscle. Nitroglycerin is ineffective in relieving the symptoms of an MI because the problem is not just reduced blood flow but a complete blockage that nitroglycerin cannot overcome.

Choice D reason: The pain associated with an MI typically lasts for more than 15 minutes and can be quite severe. Unlike stable angina, the pain of an MI is not relieved by rest or nitroglycerin. The duration and severity of the pain, along with other symptoms such as shortness of breath, sweating, nausea, or lightheadedness, help differentiate an MI from stable angina.