Cardiac ultrasound is a point-of-care imaging technique used to rapidly assess cardiac function and hemodynamic status at the bedside. It helps identify findings such as pericardial effusion, right heart strain, reduced ejection fraction, cardiac tamponade, and fluid responsiveness, allowing clinicians to make faster diagnostic and treatment decisions in emergency and acute care settings.

A 41-year-old woman presents to the emergency department with a sudden onset of dyspnea and pleuritic chest pain for two hours. She appears mildly anxious and diaphoretic. She denies fever, cough, trauma, or recent illness. She takes oral contraceptives and has no significant past medical history.

Vital signs reveal HR 113 bpm, RR 24, O₂ saturation 94% on room air, and BP 110/74 mmHg.

Her lung exam is clear. Cardiac exam reveals tachycardia without murmurs.