Pulmonary heart syndrome (PHS) has become a cardinal syndrome in more than 100 respiratory and cardiovascular diseases, often determining the severity of disease, the treatment tactics, and possible preventive measures. Mountain (Mirrakhimov, 1978) and Northern (Avtsyn, 1985) pulmonary hypertensions have been reported in literature. Low effectiveness of treatment of developed pulmonary heart makes this problem even more critical. Increased pulmonary heart prevalence underlies the difficulties in diagnostics even in specialized cardiologic and pulmonologic clinics.

Distribution of pulmonary heart syndrome diagnosis probability assessment points:

A – previously established criteria in literature;

B – our short algorithm (Evdokimov V.G. et al., 1999).

The purpose of the project is to increase PHS ECG diagnostics accuracy. 215 ECG criteria of PHS were analyzed (Evdokimov et al., 1999). Diagnostic algorithm includes 17 criteria (TaVR mode and PQ segment duration are used for the first time; the new data are obtained for RII amplitude, RaVF and Macruse index). New diagnostic limits are established for norm and pathology. The range of the results is assessed as follows: up to 1.25 points is regarded as a norm, 1.26-1.75 is considered to identify a risk group, and a value exceeding 1.75 is attributed to manifestation of the PHS. Algorithm sensitivity is 95.4%, diagnostic specificity is 98.5%, and diagnostic probability is 98.2%. A blind method control confirms the diagnosis in 81.3% of cases; hypodiagnostics is revealed in 6.2% of cases; and hyperdiagnostics is found in 12.5% of cases.