title: Unrecognized tamponade diagnosed pre-induction by focused echocardiography.
abstract: OBJECTIVE
  We report a case of unrecognized cardiac tamponade diagnosed pre-induction by focused transthoracic echocardiography (TTE). The value of focused perioperative TTE, the anesthetic implications of Churg-Strauss syndrome, and the diagnosis of cardiac tamponade are discussed.
  
  
  METHODS
  A 58-yr-old man with a history of severe asymptomatic aortic stenosis presented for elective endoscopic sinus surgery for intractable nasal polyps with recurrent sinusitis. His cardiologist and cardiac surgeon had recommended proceeding with surgery, as aortic valve replacement was not indicated because he was asymptomatic. Prior to induction, a focused TTE was performed by anesthesia in order to document the degree of aortic stenosis, baseline ventricular function, and baseline volume status. This provided a baseline for comparison in case the patient's hemodynamic status should deteriorate intraoperatively. Unexpectedly, the TTE examination revealed cardiac tamponade. After confirmation of the diagnosis by cardiology, urgent pericardiocentesis was performed. A diagnosis of Churg-Strauss syndrome was ultimately made, and the patient was treated with high-dose prednisone therapy.
  
  
  CONCLUSIONS
  Focused TTE has significant clinical utility for the diagnosis and assessment of hemodynamically significant cardiac conditions, particularly in the complex patient where clinical examination is challenging and echocardiographic findings can have immediate management implications.
authors.affiliation: Department of Anesthesiology and Perioperative Medicine, Queen's University, Kingston, ON, Canada.
authors.forename: Rebecca M
authors.initials: RM
authors.lastname: Gerlach
authors.forename: Tarit K
authors.initials: TK
authors.lastname: Saha
authors.forename: Rene V
authors.initials: RV
authors.lastname: Allard
authors.forename: Rob C
authors.initials: RC
authors.lastname: Tanzola
mesh_terms: D001024:Aortic Valve Stenosis / Q000000981:diagnostic imaging; D016280:Atrial Function, Right / Q000502:physiology; D002305:Cardiac Tamponade / Q000000981:diagnostic imaging*; D002306:Cardiac Volume / Q000502:physiology; D015267:Churg-Strauss Syndrome / Q000175:diagnosis; D017548:Echocardiography, Transesophageal / Q000379:methods*; D006801:Humans; D033162:Incidental Findings; D008297:Male; D008875:Middle Aged; D010490:Pericardial Effusion / Q000000981:diagnostic imaging; D020519:Pericardiocentesis / Q000379:methods; D010496:Pericardium / Q000000981:diagnostic imaging; D011300:Preoperative Care; D018497:Ventricular Dysfunction, Right / Q000000981:diagnostic imaging; D016276:Ventricular Function / Q000502:physiology