What is cardiac tamponade?

What is cardiac tamponade?

• A. A life-threatening complication of CABG surgery in which the heart is being compressed by an excessive amount of blood between the heart and chest wall
• B. A mild arrhythmia due to electrolyte imbalance
• C. A pulmonary embolism
• D. Acute myocardial infarction

Answer: (A)

Cardiac tamponade is a life-threatening situation where blood collects in the pericardial space after surgery, externally compressing the heart and preventing it from filling properly. In the CABG setting, postoperative bleeding or oozing into the pericardial sac can cause this compression, leading to reduced venous return, decreased stroke volume, and shock. Clinically, you’d see rapid hypotension with tachycardia and signs of poor perfusion, sometimes with elevated filling pressures and muffled heart sounds; urgent drainage is required, with pericardiocentesis as a temporizing step and surgical reexploration to evacuate the blood. This condition is distinct from a mild electrolyte-related arrhythmia, a pulmonary embolism, or an acute myocardial infarction, which involve different mechanisms and presentations.

Cardiac tamponade is a life-threatening situation where blood collects in the pericardial space after surgery, externally compressing the heart and preventing it from filling properly. In the CABG setting, postoperative bleeding or oozing into the pericardial sac can cause this compression, leading to reduced venous return, decreased stroke volume, and shock. Clinically, you’d see rapid hypotension with tachycardia and signs of poor perfusion, sometimes with elevated filling pressures and muffled heart sounds; urgent drainage is required, with pericardiocentesis as a temporizing step and surgical reexploration to evacuate the blood. This condition is distinct from a mild electrolyte-related arrhythmia, a pulmonary embolism, or an acute myocardial infarction, which involve different mechanisms and presentations.