A 60-year old obese male with a history of chronic smoking since childhood presents in ICU with pelvic fracture due to fall from height. On the 4th day of the ICU stay, he developed sudden tachypnoea, fall in SpO2 and hypotension. On 21) echo, there was a dilation of right ventricle and tricuspid regurgitation. What would be the next immediate step?
D-dimer assay Administration of heparin Pericardiocentesis Systemic thrombolysis