[Diagnosis of combined myocardial ventricular hypertrophy using precordial mapping. II. Selection of the parameters of the cartogram of diagnostic significance for the differential diagnosis of combined myocardial hypertrophy and its isolated forms].

A new approach to the choice of diagnostic criteria of combined ventricular hypertrophy (CVN) is proposed: after determination of EKG parametres differing from the norm are separately compared to the EKG parametres in isolated left ventricular hypertrophy (LVH) and right ventricular hypertrophy (RVH). The diagnostic parametres were chosen on the basis of computer statistical analysis of EKG-35 data of 136 patients with CVH, 39 with LVH, 57 with RVH and 71 normal subjects. For differentiation from LVH the amplitude/area ratio (S10 + S17 + S24)/(S1 + S8 + S15) and R27/R17 was effectively used, for differentiation from RVH parametres R14/R1 or S25/S27 are recommended.

[Diagnostic significance of the vectorcardiogram spatial indices in combined atrial dilatation].

Eighty-two apparently normal subjects and 90 patients with combined atrial dilatation were investigated, using automated amplified-image atrial VCG reproduction with an output of spatial characteristics of the Macfee-Parungao P loop, a method developed at the All-Union Center for Cardiologic Research (USSR Academy of Medical Sciences). Area enclosed by spatial P loop (SPxyz greater than or equal to 0.017 mV2), mean vector size (MPxyz greater than or equal to 120.

[Method for the automated mapping of 35 ECG leads].

The method of recording the ECGs, inputting them into a computer and automatic analysis of 35 ECG leads is described. The proposed method largely diminishes the time expenditure and difficulties in obtaining and analysing 35 ECG lead mapping grams, as the computer makes all measurements and calculations and produces a final document.