Recommendation	Class	Level
We recommend that echocardiography is performed early after cardiac arrest, particularly if immediate interventions, such as defibrillation or pacing, have failed to restore cardiac output. Transthoracic echocardiography is the most readily available modality and should generally be used first. If a transoesophageal echo (TOE) probe is in place, this should be used in preference to transthoracic echocardiography (TTE). In a prolonged arrest, teams may consider the placement of a TOE probe.	IIa	B