[Correlations between electrophysiological parameters of the heart, blood gas composition and hemodynamics in patients with chronic obstructive bronchitis].

Aim: To elucidate correlations between gas composition of blood, hemodynamic and electrophysiological parameters of the heart and effect of these indices on arrhythmia onset in patients with chronic obstructive bronchitis (COB).

Material And Methods: "Rhythm" ECG, 24-h ECG monitoring, transesophageal pacing, heart ultrasonography were performed in 160, 67, 160 of 160 patients with chronic obstructive bronchitis (COB), respectively. 76 patients suffered from respiratory insufficiency (RI) degree 1 and 84 of RI degree 2. 58 patients free of RI served control. Gas composition of the blood and acid-base balance of the capillary blood were examined in 50 patients.

Results: Shortening of effective refractory atrial period and prolongation of interatrial conduction predispose to emergence of suptaventricular arrhythmia in COB patients with RI. With the onset and development of RI in COB patients, heart chamber size and myocardial function become more and more essential for cardiac electrophysiological parameters. For COB patients free of RI, gas composition of capillary blood is of key importance in this respect.

Conclusion: The proposed complex clinicofunctional method for assessment of electrophysiological condition of the heart with evaluation of intracardiac hemodynamics and gas composition of the capillary blood is recommended for registration of signs of the onset and unfavorable progress of cardiac arrhythmia in COB patients with RI as well as for objective and safe control over effectiveness of treatment of such patients.