A 50 -year-old man presents with sudden onset of dyspnea breathlessness and chest pain. Examination shows tachypnea, hypotension, cyanosis, jugular vein distension, tachycardia and low-grade fever. The most likely diagnosis is?

1. A

   Acute MI

2. B

   Acute attack of bronchial asthma

3. C

   Stroke

4. D

   Pulmonary embolism

Appeared in: Chitranjjan National Cancer Institute Kolkata - 2021

Explanation

• The patient's presentation of sudden dyspnea, chest pain, and signs of shock (hypotension, tachycardia, cyanosis) is highly suggestive of a massive pulmonary embolism (PE).
• The key finding of jugular vein distension (JVD) combined with hypotension indicates acute right ventricular failure, a hallmark of a large PE causing obstructive shock.
• A massive PE obstructs a large portion of the pulmonary arterial tree, drastically increasing the pressure the right ventricle must pump against. This leads to acute failure, decreased blood flow to the left side of the heart, and subsequent systemic hypotension.
• Other signs like tachypnea, tachycardia, and cyanosis are direct consequences of the impaired gas exchange and the body's compensatory mechanisms.
• A low-grade fever can also be an associated finding in PE due to the inflammatory response.

Why Other Options Were Wrong

• Option A: While an Acute Myocardial Infarction (MI) can cause chest pain, dyspnea, and hypotension, the prominent jugular vein distension (JVD) is less common unless the MI specifically affects the right ventricle. The overall picture fits more classically with PE.
• Option B: An acute asthma attack is an obstructive airway disease characterized by bronchospasm and wheezing. It does not typically cause hypotension or jugular vein distension.
• Option C: A stroke is a cerebrovascular event. Its primary signs are neurological deficits, such as unilateral weakness, facial droop, or speech difficulties. The patient's symptoms are cardiorespiratory, not neurological.

Related Visual

Clinical Relevance

• Nursing practice connection: Use the key finding related to Differential diagnosis of acute dyspnea and chest pain with hemodynamic instability to guide bedside assessment, documentation, and the next nursing action.
• Recognizing the signs of a massive PE is a critical nursing skill, as it is a life-threatening emergency requiring immediate intervention.
• The combination of hypotension and JVD in a patient with acute dyspnea should immediately raise suspicion for PE, tension pneumothorax, or right ventricular MI. This is a classic triad for obstructive shock.
• Immediate nursing priorities include administering high-flow oxygen, establishing large-bore IV access, continuous monitoring of vital signs and oxygen saturation, and preparing for definitive diagnostic imaging (like a CT pulmonary angiogram) and potential thrombolytic therapy.

How to Approach the Question

• First, analyze the patient's chief complaints: sudden dyspnea and chest pain. This points to a serious cardiorespiratory event.
• Next, evaluate the physical examination findings as a cluster. Note the signs of respiratory distress (tachypnea, cyanosis) and cardiovascular collapse (hypotension, tachycardia).
• Identify the most specific and telling sign: the combination of hypotension and jugular vein distension (JVD). This pairing strongly suggests acute right-sided heart failure.
• Correlate this key finding with the differential diagnoses. Ask yourself: Which of these conditions best explains acute right heart failure?
• Pulmonary embolism directly obstructs the pulmonary artery, causing an abrupt overload on the right ventricle, leading to the observed signs.
• Rule out the other options based on this key differentiator. MI typically affects the left ventricle, asthma is an airway issue, and stroke is a neurological issue.

Concept Tested & Keywords

• Concept Tested: Differential diagnosis of acute dyspnea and chest pain with hemodynamic instability.
• Stem keywords: sudden onset, dyspnea, chest pain, tachypnea, hypotension, cyanosis, jugular vein distension, tachycardia
• Lead-in keywords: most likely diagnosis
• Clinical cues: The combination of sudden respiratory distress (dyspnea, tachypnea, cyanosis) and signs of acute right heart failure (hypotension, JVD) is a critical clue pointing to a massive pulmonary embolism.

Question ID

QmNKod7JM5kobhDvPnPkIJ

Copy ID

Reference Book

E6 Medicine Davidson Principles Practice 24e pp. 200-202, 199-201

E6 Medicine Harrison 22e Part 1 p. 147-149