A male patient, aged 55, arrives at the acute care clinic complaining of worsening shortne… — USMLE Step 2 CK

A male patient, aged $55$ , arrives at the acute care clinic complaining of worsening shortness of breath and chest discomfort over the past two days. He recently recovered from a severe viral respiratory infection. He describes the chest pain as sharp and states that it lessens significantly when he sits up and leans forward. Within the last two hours, he has felt increasingly dizzy. Vital signs show a temperature of $37.8^\circ\text{C}$ ( $100.0^\circ\text{F}$ ), a blood pressure of $88/72$ mm Hg, a heart rate of $118$ /min, and a respiratory rate of $22$ /min. Physical examination reveals prominent distention of the neck veins and heart sounds that are noticeably faint on auscultation. An exaggerated drop in systolic blood pressure during inspiration is observed. Arrange the following management steps in the most appropriate chronological sequence for this patient.

1Perform a bedside transthoracic echocardiogram
2Administer an intravenous normal saline bolus
3Perform urgent percutaneous pericardiocentesis
4Perform a surgical pericardial window

Answer

The correct sequence is to first perform a bedside transthoracic echocardiogram to confirm the diagnosis, then administer an intravenous normal saline bolus to temporize hemodynamics, followed by urgent percutaneous pericardiocentesis for definitive acute treatment, and finally a surgical pericardial window if the effusion recurs.

In a patient presenting with hypotension, jugular venous distention, distant heart sounds, and pulsus paradoxus following a viral illness, cardiac tamponade is the most likely diagnosis. The initial step is to rapidly confirm the presence of a pericardial effusion with a bedside transthoracic echocardiogram. Because the patient is hypotensive, temporizing measures such as an intravenous normal saline bolus should be administered to increase right-sided filling pressures and maintain cardiac output. Once the diagnosis is confirmed and the patient is temporarily stabilized, urgent percutaneous pericardiocentesis must be performed to drain the fluid and relieve the elevated intrapericardial pressure. Finally, if the effusion recurs or cannot be adequately managed percutaneously, a surgical pericardial window is the appropriate definitive procedure.

Step-by-Step Solution

Diagnose the condition

Bedside transthoracic echocardiogram

Confirms the clinical suspicion of cardiac tamponade by demonstrating a pericardial effusion with right-sided heart chamber collapse during diastole.

Temporize hemodynamics

Intravenous normal saline bolus

Increases right ventricular preload to overcome elevated intrapericardial pressure, temporarily improving stroke volume and blood pressure.

Perform definitive acute treatment

Urgent percutaneous pericardiocentesis

Directly removes the pericardial fluid, relieving the pressure on the heart and definitively restoring normal hemodynamics.

Manage potential recurrence

Surgical pericardial window

Provides continuous drainage and is indicated if the effusion reaccumulates after initial pericardiocentesis.

Key Concept

Management sequence for cardiac tamponade: Diagnosis (Echocardiogram) → Temporization (IV fluids) → Acute treatment (Pericardiocentesis) → Long-term management of recurrence (Pericardial window).

Question

Answer

Step-by-Step Solution

Key Concept

Common Mistakes

Topics

More questions from this topic