[Assessment of induced noninvasively postextrasystolic potentiation on the right ventricular function in patients with cor pulmonale].
The indices of postextrasystolic potentiation degree (Rpesp: Rcdz/dt, RHI, delta Q-Zc, delta PEP/RVET) were observed in the patients with cor-pulmonale, chronic obstructive pulmonary disease (COPD) and normal subjects using extrasystole induced by transesophageal atrial pacing combined with differential impedance rheopneumography. The results shows that Rpesp of the patients with cor-pulmonale was larger than that of the patients with COPD and the normal subjects. The positive rates of RCdz/dt, RHI, delta Q-Zc, delta PEP/RVET was detected respectively in 95%, 100%, 85%, 85% of the cor-pulmonale and in 60%, 60%, 70%, 60% in COPD. It suggested that this method be a safe, simple and reliable one to assess right ventricular contraction function and to diagnose early cor-pulmonale.
Liu
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Cardiovascular Department, First Affiliated Hospital, Wenzhou Medical College.
D000368:Aged; D000369:Aged, 80 and over; D005117:Cardiac Complexes, Premature / Q000503:physiopathology; D002304:Cardiac Pacing, Artificial / Q000379:methods; D005260:Female; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D009200:Myocardial Contraction; D011660:Pulmonary Heart Disease / Q000503:physiopathology*; D016278:Ventricular Function, Right