system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Beck's triad of cardiac tamponade doesn't includes
assistant
The correct answer is  Ref Harrison 19 th ed pg 1573 The three principal features of tamponade (Beck's triad) are hypo- tension, soft or absent hea sounds, and jugular venous distention with a prominent x descent but an absent y descent. The limitations of ventricular filling are responsible for a reduction of cardiac output. The quantity of fluid necessary to produce cardiac tamponade may be as small as 200 mL when the fluid develops rapidly to as much as >2000 mL in slowly developing effusions when the pericardium has had the oppounity to stretch and adapt to an increasing volume.