A mother calls her pediatrician's office concerned about her 7-month-old son. She gave him peanuts for the second time for lunch and he has vomited three times is coughing and looks flushed. What is the priority of the nurse?

Secondary hypertension in children is hypertension (high blood pressure) that is caused by an underlying medical condition or medication. The primary approach to managing secondary hypertension is to identify and treat the underlying cause. This may involve medical treatment, surgery, or other interventions, depending on the specific condition responsible for the high blood pressure.

While lifestyle modifications such as a low-salt diet, increased exercise, fitness, and weight reduction can be important components of managing blood pressure in some cases, they are not the primary therapy for secondary hypertension. The focus should be on addressing the root cause of hypertension, and lifestyle modifications may be recommended as part of the overall treatment plan.

B. Cardiac Catheterization.
Cardiac Catheterization (B): Cardiac catheterization is an invasive procedure that involves threading a catheter into the heart's chambers and major blood vessels. It allows direct visualization of the coronary arteries, measurement of blood pressure within the heart, assessment of blood flow, and the ability to perform interventions such as angioplasty or stent placement. Cardiac catheterization is considered the gold standard for diagnosing coronary artery disease, evaluating heart valve function, and detecting congenital heart abnormalities.

Explanation:
A. Echocardiogram (A): An echocardiogram is a non-invasive imaging test that uses sound waves to create images of the heart. It is excellent for assessing the structure and function of the heart, including heart valve function and blood flow patterns. While it is a valuable tool for cardiac assessment, it may not provide the level of detail and direct visualization that cardiac catheterization offers.
C. Chest X-Ray (CXR) (C): A chest X-ray can provide information about the size and shape of the heart and detect certain abnormalities such as an enlarged heart or fluid in the lungs. However, it may not offer the level of detail required to diagnose specific cardiac issues accurately.
D. Electrocardiogram (ECG) (D): An ECG records the electrical activity of the heart and is useful for diagnosing arrhythmias and certain conduction abnormalities. While it provides essential information about cardiac rhythm, it does not directly visualize the structural aspects of the heart or blood flow.

In summary, while each of these diagnostic tools plays a crucial role in assessing cardiac issues, cardiac catheterization is the most accurate and comprehensive option for diagnosing a wide range of cardiac conditions due to its direct visualization and intervention capabilities. However, the choice of diagnostic test should always be made based on the patient's specific clinical presentation and the suspected cardiac problem.