A nurse is reinforcing teaching to a group of nursing students about causes of traumatic brain injuries (TBIs). Which of the following should the nurse include in the teaching? (Select All that Apply.)

A. The aortic and mitral valves are the most commonly replaced valves: This statement is accurate. The aortic and mitral valves are indeed the most commonly replaced valves in cardiac valve replacement surgeries. Aortic valve replacement is commonly performed for conditions such as aortic stenosis or regurgitation, while mitral valve replacement is often indicated for mitral regurgitation or stenosis.

B. Mitral valve insufficiency occurs during the diastolic phase of the cardiac cycle: This statement is incorrect. Mitral valve insufficiency, also known as mitral regurgitation, occurs during the systolic phase of the cardiac cycle. It involves the backflow of blood from the left ventricle into the left atrium during ventricular systole, leading to volume overload of the left atrium and potentially causing symptoms such as dyspnea and fatigue.

C. Inadequate closure of the tricuspid valve causes overload in the left ventricle: This statement is incorrect. Inadequate closure of the tricuspid valve leads to regurgitation of blood from the right ventricle back into the right atrium during ventricular systole. This condition, known as tricuspid regurgitation, causes volume overload in the right atrium and ventricle, rather than overload in the left ventricle.

D. Aortic stenosis increases right ventricular systolic pressure and decreases afterload: This statement is partially correct. Aortic stenosis indeed increases left ventricular systolic pressure and decreases afterload, not right ventricular pressure. The increased afterload on the left ventricle can lead to left ventricular hypertrophy and eventually heart failure. However, aortic stenosis does not directly affect right ventricular systolic pressure.

A. Lisinopril: Lisinopril is an angiotensin-converting enzyme (ACE) inhibitor commonly used to treat hypertension and heart failure. It is not typically contraindicated for cataract extraction surgery, and it does not significantly increase the risk of bleeding.

B. Synthroid: Synthroid is a synthetic form of thyroid hormone used to treat hypothyroidism. It does not have any direct contraindications with cataract extraction surgery and does not significantly increase the risk of bleeding.

C. Clopidogrel: Clopidogrel is an antiplatelet medication commonly used to prevent blood clots in individuals with cardiovascular diseases such as coronary artery disease or recent myocardial infarction. However, it can increase the risk of bleeding, which may be problematic during cataract extraction surgery. Therefore, it is important to question administering clopidogrel prior to the procedure and potentially coordinate with the healthcare provider regarding its management.

D. Omeprazole: Omeprazole is a proton pump inhibitor used to reduce stomach acid production and treat conditions such as gastroesophageal reflux disease (GERD) and peptic ulcer disease. It does not have any direct contraindications with cataract extraction surgery and does not significantly increase the risk of bleeding.