Patent ID: 7231244
Filing Date: 2007-06-12
Classification: A61B

Abstract:
1. A method for predicting perioperative myocardial isehemia in a patient, the method comprising the steps of: obtaining heart rate data from the patient before an operation, the data being obtained in a preoperative time period including a nocturnal time period and a diurnal time period; carrying out a dynamic heart rate variability analysis of nocturnal heart rate data and of diurnal heart rate data to obtain a short term fractal correlation property of heart rate variability in a defined nocturnal time period and in a defined diurnal time period; comparing the defined nocturnal time period short term fractal correlation property and the defined diurnal time period short term fractal correlation property; determining from the comparison whether the nocturnal time period short term fractal correlation property is less than the diurnal time period short term fractal correlation property; and establishing a determination that the defined nocturnal time period short term fractal correlation property is less than the defined diurnal time period short term fractal correlation property as predictive for myocardial ischemia in a time subsequent to obtaining the heart rate data from the patient.