Chest, Vol 97, 1092-1097, Copyright © 1990 by American College of Chest Physicians

ARTICLES

Cardiac arrhythmias and left ventricular function in respiratory failure from chronic obstructive pulmonary disease

RA Incalzi, R Pistelli, L Fuso, A Cocchi, MG Bonetti and A Giordano
Istituto di Clinica Medica, Universita Cattolica Sacro Cuore, Rome, Italy.

In 22 patients with COPD, we studied the relationship between left ventricular function and cardiac arrhythmias. Ventricular arrhythmias were detected on a 24-h ECG recorded at the beginning of the observation period and after a stable improvement of RF. Left ventricular function was evaluated by equilibrium-gated radionuclide angiocardiography measuring LVEF, PER and PFR. We found a significant decrease in the arrhythmia score after improvement of RF; LVEF and PFR were slightly depressed in six and nine patients, respectively. A "step- up" multiple regression analysis revealed a significant inverse correlation between PFR and ventricular arrhythmias during worsened RF, whereas LVEF, arterial blood gases and clinical data were not significantly predictive variables. Thus, a depressed left ventricular diastolic performance seems to be a predictive factor for arrhythmias during RF from COPD. The poor definition of the statistical model suggests that other presently unknown factors contribute to the genesis of ventricular arrhythmias.

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