In suspected cardiac tamponade, which diagnostic and therapeutic steps should be prepared promptly?

• A. Electrocardiogram and observation.
• B. MRI of the chest.
• C. Echocardiogram and pericardiocentesis.
• D. Chest X-ray and delay.

Answer: (C)

In suspected cardiac tamponade, the priority is rapid confirmation of the effusion causing compression and immediate relief of the pressure. Bedside echocardiography is the fastest and most informative test here, because it can confirm the presence of a pericardial effusion and reveal hemodynamic effects such as diastolic collapse of the right-sided chambers and variation in filling. This real-time imaging guides urgent management and helps assess how much fluid is contributing to the tamponade.

Once tamponade is confirmed, pericardiocentesis is the essential therapeutic step to drain the fluid and relieve the external pressure on the heart, allowing normal filling and improved circulation. This combination of quick diagnosis with prompt drainage directly addresses the life-threatening physiology.

Other choices fall short because an ECG with observation does not relieve the mechanical obstruction, MRI is not practical in an emergency due to time and stability requirements, and chest X-ray with delay does not provide timely diagnosis or treatment in a patient who may deteriorate rapidly.