A nurse s teaching a group of clients about modifiable risk factors for cardiovascular disease. Which of the following should the nurse include in the teaching? (Select All that Apply).

A) A heart murmur is a high-pitched sound caused by a narrowing of a heart valve:
While it's true that a narrowing of a heart valve (stenosis) can cause a murmur, the description of a heart murmur as a "high-pitched sound" due to this narrowing is overly specific and does not fully explain what a murmur is. A murmur is not always high-pitched, and it is caused by turbulent blood flow, which may occur for various reasons beyond just valve stenosis.

B) A heart murmur is an extra sound heard from blood entering a rigid heart chamber:
This description is somewhat inaccurate. While murmurs can result from turbulent blood flow through the heart chambers or valves, the idea that murmurs are "extra sounds from blood entering a rigid heart chamber" is misleading. A murmur occurs when there is turbulent blood flow, which can happen in both rigid and non-rigid chambers. The key point is that it's the turbulent flow, not just rigidity, that causes the sound.

C) A heart murmur is a sound generated by inflammation around the heart muscle:
This is incorrect. Inflammation around the heart muscle, such as in pericarditis, can cause chest pain or other symptoms but does not generate a heart murmur. A murmur is caused by turbulent blood flow, which can result from various heart valve issues (e.g., stenosis, regurgitation) or defects in the heart's structure (e.g., septal defects), not from inflammation around the heart muscle.

D) A heart murmur indicates turbulent blood flow through a valve in the heart:
This is the most accurate description. A heart murmur is typically caused by turbulent or irregular blood flow through a heart valve. This can occur for several reasons, such as valve stenosis (narrowing), valve regurgitation (leakage), or congenital heart defects that cause abnormal flow patterns. The turbulent flow disrupts the normal laminar (smooth) blood flow, creating the characteristic sound that can be heard with a stethoscope. Murmurs can vary in timing, pitch, and intensity depending on the nature of the flow disturbance.

A) Demonstrate that both arteries will be palpated simultaneously to compare amplitude: This is not recommended. Palpating both carotid arteries simultaneously can cause a decrease in blood flow to the brain, potentially leading to dizziness or syncope. It is important to palpate one carotid artery at a time to avoid reducing blood flow to the brain, especially in clients with cardiovascular disease or those at risk of stroke.

B) Instruct the client to take a deep breath and "hold" while the nurse briefly auscultates: This is the correct approach. Instructing the client to hold their breath helps minimize any interference from respiratory sounds while auscultating the carotid arteries for bruits. This technique ensures that breath sounds do not mask any abnormal vascular sounds, such as bruits, which could indicate a blockage or narrowing of the carotid arteries.

C) Discuss that a light will be directed at the neck to observe for pulsations of the artery: Observing pulsations with light is not an appropriate technique for assessing the carotid arteries. Pulsations may be visible in some cases, but palpation and auscultation are the more reliable methods for evaluating the carotid arteries for abnormalities such as bruits or reduced pulse amplitude.

D) Show the client the diaphragm of the stethoscope that will be placed on the neck: While it is appropriate to explain the process to the client, the action of showing the stethoscope is unnecessary at this stage. The focus should be on instructing the client to hold their breath for proper auscultation to listen for any abnormal vascular sounds.