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Steban, A., Alia, I., Tobin, M.J., Gil, A., Gordo, F., Vall- verdu, I., Blanch, L., Bonet, A., Vazquez, A., Pablo, R.D., Torres, A., de la Cal, M.A. and Macias, S. (1999) Effect of spontaneous breathing trial on outcome of attempts to discontinue mechanical ventilation. Spanish Lung Failure Collaborative Group. American Journal of Respiratory and Critical Care Medicine, 159, 512-518.

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• TITLE: The prognostic impact of P wave dispersion in prediction of clinical outcome after percutaneous balloon mitarl valvuloplasty in patients with mitral stenosis and sinus rhythm

  AUTHORS: Ragab A. Mahfouz, Ashraf E. Dewedar

  KEYWORDS: P-Wave Maximum P-Wave Minimum; P-Wave Dispersion; Rheumatic Mitral Stenosis; Cardiac Events; Follow-Up

  JOURNAL NAME: World Journal of Cardiovascular Diseases, Vol.3 No.1, January 24, 2013

  ABSTRACT: Objective: The aim of the study was to investigate the impact of P-maximum and P-wave dispersion on the long term clinical outcome after successful percutaneous balloon mitral valvuloplasty (PBMV) in patients with mitral stenosis (MS) and sinus rhythm. Also to test the correlation between P-variables and right ventricular function and pulmonary artery pressure before and after PMBV. Methods: Eighty-five patients undergoing PMBV were enrolled in this study. We evaluated P-maximum, P-minimum and P-wave dispersion before and one month after PBMV. We studied the changes in pulmonary arterial pressure (PAP), left atrial (LA) dimension, mitral diastolic gradient, and mitral valve area, in addition to the changes in right ventricular function utilizing tissue Doppler assessment both before and after PMBV, in addition the role of the P-wave dispersion in predicttion of late cardiac events. Results: There were significant decreases in mean diastolic gradient, PAP, and LA size and significant improvement in right ventricular tissue Doppler indices after PMBV. Ac- company these hemodynamic changes after PMBV. P-maximum and P-wave dispersion were found to be decreased (P off values of ≥62.8 msec for P-wave dispersion and 118 mes for P-maximum.ROC curve showed AUC of 0.919 for P-wave dispersion and 0.913 for P-maximum (P