When caring for a client who has developed cardiac tamponade, what assessments should the nurse expect to find?
A.
Pleural friction rub.
B.
Distended neck veins.
C.
Widening pulse pressure.
D.
Bradycardia.
The Correct Answer and Explanation is :
The correct answer is B. Distended neck veins.
Explanation
Cardiac tamponade occurs when fluid accumulates in the pericardial space, exerting pressure on the heart and impairing its ability to pump effectively. This condition can result from various causes, including trauma, malignancy, or infection. The fluid accumulation creates a restrictive environment around the heart, which can lead to several characteristic clinical findings.
1. Distended Neck Veins (Jugular Venous Distension): One of the hallmark signs of cardiac tamponade is distended neck veins. This occurs because the impaired filling of the heart increases the pressure in the right atrium, which in turn causes increased venous pressure. The jugular veins, being directly connected to the right atrium, become engorged with blood, visible as distension in the neck. This finding is often observed when the patient is in a semi-recumbent position and is indicative of elevated central venous pressure.
2. Pleural Friction Rub: A pleural friction rub is associated with pleuritis or pleural inflammation, not cardiac tamponade. It is a grating sound heard on auscultation of the lungs due to inflamed pleural surfaces rubbing together. This sound is not typical in cardiac tamponade.
3. Widening Pulse Pressure: In cardiac tamponade, pulse pressure typically narrows, not widens. The narrowing of the pulse pressure is a result of decreased cardiac output and reduced systolic blood pressure, while diastolic pressure remains relatively stable. Widening pulse pressure is more commonly seen in conditions like aortic regurgitation or other types of heart failure.
4. Bradycardia: Bradycardia (slow heart rate) is not a primary feature of cardiac tamponade. Instead, cardiac tamponade often presents with tachycardia (rapid heart rate) as the body compensates for reduced cardiac output. Bradycardia may occur in some cases if the tamponade is severe and causes significant pressure on the heart, but it is not a characteristic finding.
In summary, distended neck veins are a key assessment finding in cardiac tamponade, reflecting elevated central venous pressure due to impaired cardiac filling.