ZyraDoc #14 - August 15, 2026

A 54-year-old woman with metastatic lung adenocarcinoma presents to the emergency department with progressive dyspnea, fatigue, and lightheadedness.

She is promptly administered an aggressive IV isotonic fluid bolus to temporarily maintain right ventricular preload while diagnostic workup is underway.

Despite initial fluid resuscitation, her blood pressure precipitously drops to 76/48 mmHg with muffled heart sounds, marked JVD, and a confirmed right ventricular diastolic collapse.

Case Summary

Clinical Focus:

A 54-year-old female presents with acute cardiac tamponade who rapidly deteriorates into refractory obstructive shock despite initial IV fluid resuscitation.

Clinical Signs of Cardiac Tamponade:

Beck's Triad: Hypotension, jugular venous distension (JVD), and muffled/distant heart sounds
Pulsus paradoxus: Exaggerated drop in systolic blood pressure (> 10 mmHg) during inspiration
Echocardiographic features: Pericardial effusion with right atrial or right ventricular diastolic collapse and plethoric inferior vena cava

While IV fluids temporarily optimize right ventricular preload, mechanical intrapericardial compression requires immediate pericardiocentesis to restore cardiac output.

Here is the Management Strategy:

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