Diagnosis of ischaemic heart disease based on data of precordial mapping

To increase the efficacy of electrocardiographic diagnosis of ischaemic heart disease (IHD), the authors searched for new ECG parameters using the method of precordial mapping and computer map analysis. The study was made in a group of 95 IHD patients, with diagnosis confirmed with the use of visual methods (coronary angiography and left ventriculography). On 12-lead ECG, the signs of focal cicatrization were found in none of examined patients, and ischaemic changes were present in 23% only. 98 practically healthy people were used as controls. With the aid of mathematical methods including the step-wise discriminant analysis, a classificatory function was construed enabling to increase the sensitivity of IHD diagnosis to 83% at an 85 percent specificity.