title: [The U-wave in ischemia and left ventricular dysfunction after myocardial infarct].
abstract: BACKGROUND
  The occurrence of U-wave in electrocardiogram appears after T-wave. It is period of the greatest excitability of the myocardium in heart electrical activity usually of the some direction as its own T-wave. AIM OF THE WORK ANALYSE: U-wave with ischaemia and dysfunction of the myocardium in exercise test.
  
  
  METHODS
  The prospective study has been done for 51 patients. Electrocardiogram, exercise test vas made for all patients and immediately after test, echocardiography with Doppler and colour-Doppler. In the analysis of dysfunction of the left chamber these important parameters were followed: METS; decrease of blood pressure, devaluation of ST-segment, U-wave, heart rate, dyspnea, sweating and paleness.
  
  
  RESULTS
  Positive U-wave was noticed in 51%, negative in 24% examinees. Sensitivity of U-wave on the base of the breakdown of segmental vall motion in echocardiography (ischaemia) is 66.67% with false negative resists of 33.33%. Systolic dysfunction with influential parameters correlates in the best way with decrease of blood pressure and regressive coefficient is 66.93, but the weabest correlation is with U-wave (0.53). Correlative coefficient for U-wave in systolic function is 0.263. Regressive coefficient with influential parameters in diastolic dysfunction is 3.34, correlative coefficient is 0.108.
  
  
  CONCLUSIONS
  U-wave in registered at rest after exercise test when heart rate is equal or below 95 in a minute. Registration of U-wave is an additional parameter in diagnostics of ischaemia and dysfunction of the myocardium of the left chamber (small influence).
authors.affiliation: Interna klinika, Medicinski fakultet Univerziteta u Tuzli, Univerzitetski Klinicki Centar Tuzla.
authors.forename: Fahir
authors.initials: F
authors.lastname: Baraković
authors.forename: Zumreta
authors.initials: Z
authors.lastname: Kusljugić
authors.forename: Elnur
authors.initials: E
authors.lastname: Smajić
authors.forename: Amila
authors.initials: A
authors.lastname: Arslanagić
authors.forename: Vjekoslav
authors.initials: V
authors.lastname: Gerc
mesh_terms: D004452:Echocardiography; D004562:Electrocardiography; D005080:Exercise Test; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000150:complications / Q000503:physiopathology*; D017202:Myocardial Ischemia / Q000175:diagnosis* / Q000209:etiology; D018487:Ventricular Dysfunction, Left / Q000175:diagnosis* / Q000209:etiology