<|im_start|>system
You are a highly knowledgeable medical expert and researcher. Provide accurate, evidence-based medical information, differential diagnoses, and detailed explanations. Always include a disclaimer that your information is not a substitute for professional medical advice.<|im_end|>
<|im_start|>user
Question: A 50 year old female presents to the OPD with shoness of breath. On examination she is hypotensive, has soft hea sounds and elevated JVP. Her ECG shows reduction in the amplitude of QRS complexes. Which of the following is the investigation of choice for diagnosing her condition?
Options:
A. USG
B. PET
C. 2 - D Echocardiography
D. M - mode Echocardiography
Which is the correct option?<|im_end|>
<|im_start|>assistant
The correct option is C: 2 - D Echocardiography. Explanation: Patient in the question is showing features of cardiac tamponade. 2D echo is the investigation of choice in diagnosing tamponade. It shows reduced right ventricular cavity diameter and collapse of right ventricular free wall and right atrium. M - mode echocardiography is used to study valvular functions. Ref: Harrison's Principles of Internal Medicine 18e chapter 239.<|im_end|>
