title: Echocardiography in cardiac arrest.
abstract: OBJECTIVE
  Successful resuscitation requires potentially reversible causes to be diagnosed and reversed, and many of these can readily be diagnosed using echocardiography. Although members of the resuscitation team routinely use adjuncts to their clinical examination in order to differentiate these causes, the use of echocardiography is not yet considered standard. The purpose of this review is to discuss the potential for echocardiography to aid diagnosis and treatment during resuscitation, together with some of the perceived challenges that currently limit its widespread use.
  
  
  RESULTS
  Many studies have demonstrated the value of echocardiography in the assessment of critically ill patients in the intensive care unit and emergency room settings, including more recently the use of focused echocardiography. This can be performed within the time frame allowed during the pulse check of the advanced life support (ALS) algorithm. ALS-compliant focused echocardiography can be taught to nonexpert practitioners such that high-quality cardiopulmonary resuscitation is not compromised while diagnosing/excluding some of the potential causes of cardiac arrest.
  
  
  CONCLUSIONS
  Persistent and worsening haemodynamic instability are regarded as clear indications for echocardiography. The focused application of this well established technique within the ALS algorithm provides the resuscitation team with a potentially powerful diagnostic tool that can be used to diagnose/exclude some of the potentially treatable causes of cardiac arrest as well as to guide therapeutic interventions. The impact of routine periresuscitation echocardiography on patient outcomes both for in-hospital and prehospital care remains an exciting avenue for future research.
authors.affiliation: Royal Brompton & Harefield NHS Foundation Trust, UK. s.price@rbht.nhs.uk <s.price@rbht.nhs.uk>
authors.forename: Susanna
authors.initials: S
authors.lastname: Price
authors.forename: Shahana
authors.initials: S
authors.lastname: Uddin
authors.forename: Tom
authors.initials: T
authors.lastname: Quinn
mesh_terms: D000465:Algorithms; D016887:Cardiopulmonary Resuscitation / Q000379:methods*; D016638:Critical Illness; D004452:Echocardiography; D004617:Embolism / Q000175:diagnosis / Q000000981:diagnostic imaging; D004636:Emergency Service, Hospital / Q000458:organization & administration; D006323:Heart Arrest / Q000000981:diagnostic imaging* / Q000517:prevention & control / Q000628:therapy; D006331:Heart Diseases / Q000175:diagnosis / Q000000981:diagnostic imaging; D006439:Hemodynamics; D006801:Humans; D007362:Intensive Care Units / Q000458:organization & administration*; D013927:Thrombosis / Q000175:diagnosis / Q000000981:diagnostic imaging