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[The degree of functional circulatory failure according to NYHA classification and the state of hemodynamic disorders in constrictive pericarditis].

Selected indices of left and right ventricular function and pulmonary circulation have been compared in two groups of patients with constrictive pericarditis: i.e. in 10 patients classified as NYHA functional class II and 13 patients as NYHA class III. The patients with NYHA class III showed higher average values of left ventricular end-diastolic pressure (mean + 19.4 vs 11.4 mm Hg) and right ventricular end-diastolic pressure (mean + 17.3 vs 9.5 mm Hg) as well as pulmonary systolic (mean + 39.5 vs 24.5 mm Hg) and diastolic pressure (mean + 20.6 vs 9.9 mm Hg). Mean total pulmonary resistance and left and right ventricular stiffness indices were slightly higher whereas cardiac index was slightly lower. Complaints of patients with constrictive pericarditis, fatigability and dyspnea are to a large extent determined by the level of end-diastolic pressure in both ventricles and pulmonary hypertension that is by similar direct mechanism as in congestive heart failure.