A 48-year-old woman presents to the hospital complaining of chest pain, tachycardia, and dyspnea. On exam, heart sounds are muffled. Which of the following assessment findings would support a diagnosis of cardiac tamponade?

1. A

   Blood pressure 140/80

2. B

   A deviated trachea

3. C

   Absent breath sounds to the lower lobes

4. D

   Distended neck vein

Appeared in: HPSSC - 2015

Explanation

• Distended neck veins, also known as Jugular Venous Distension (JVD), are a classic sign of cardiac tamponade.
• This sign is a key component of Beck's triad, the three hallmark signs of cardiac tamponade: 1) Hypotension, 2) Jugular Venous Distension, and 3) Muffled heart sounds.
• The patient in the scenario already presents with muffled heart sounds, so the presence of distended neck veins strongly supports the diagnosis.
• The distention occurs because increased pressure from fluid in the pericardial sac compresses the heart, impeding venous return and causing blood to back up into the jugular veins.

Why Other Options Were Wrong

• Option A: This reading indicates hypertension. Cardiac tamponade causes a significant drop in cardiac output, which results in hypotension (low blood pressure), not hypertension.
• Option B: A deviated trachea is the hallmark sign of a tension pneumothorax, where a buildup of air in the pleural space pushes the mediastinum to the opposite side.
• Option C: This is a pulmonary finding that suggests a problem within the lungs or pleural space, such as a large pleural effusion, atelectasis, or pneumothorax.

Related Visual

Clinical Relevance

• Nursing practice connection: Use the key finding related to Assessment of Cardiac Tamponade to guide bedside assessment, documentation, and the next nursing action.
• Recognizing the signs of cardiac tamponade is a critical nursing skill, as it is a life-threatening medical emergency that requires immediate intervention to prevent cardiovascular collapse.
• The definitive treatment is pericardiocentesis, a procedure to drain the excess fluid from the pericardial sac. Nurses must be prepared to assist with this emergency procedure.
• What if? If the patient's blood pressure was 85/60 mmHg instead of 140/80, this would represent hypotension and complete all three signs of Beck's triad, making the diagnosis of cardiac tamponade even more certain and the situation more critical.

How to Approach the Question

• First, identify the key diagnosis suggested in the question: cardiac tamponade.
• Recall the classic clinical presentation for this condition, specifically the three signs of Beck's triad.
• Analyze the patient's signs and symptoms provided in the stem: chest pain, tachycardia, dyspnea, and muffled heart sounds. Note that one part of Beck's triad (muffled heart sounds) is already present.
• Evaluate each option to determine which one represents another component of Beck's triad or a related key finding.
• Systematically eliminate options that are characteristic of other conditions (e.g., tracheal deviation for tension pneumothorax) or contradict the expected findings of tamponade (e.g., hypertension instead of hypotension).

Concept Tested & Keywords

• Concept Tested: Assessment of Cardiac Tamponade
• Stem keywords: chest pain, tachycardia, dyspnea, muffled heart sounds, cardiac tamponade
• Lead-in keywords: support a diagnosis
• Clinical cues: The combination of muffled heart sounds and dyspnea in a patient with chest pain is a strong indicator of a pericardial process.

Question ID

QEqZkjhPe9L7vN2FAAXLpM

Copy ID

Reference Book

E6 Medicine Harrison 22e Part 1 p. 2122-2124

E6 Nelson Textbook of Pediatrics(2024) — Volume 2 p. 680-682