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This study was designed to evaluate the usefulness of non-invasive parameters in the follow-up of cardiopathic patients without valvular cardiac diseases. In 49 patients suffering from heart disease we have studied the changes of radiologic cardiac measurements and systolic time intervals (STI) in the 4 functional classes of the NYHA classification, investigating also the existence of any relationship between these different parameters. Only the patients in the 3rd and the 4th functional classes showed significant changes in STI and radiologic measurements, as compared with the control group. Moreover, significant negative correlations have been observed between relative heart volume and LVET (r = 0.69, P less than 0.001) and LVETc (r = 0.82, P less than 0.001) and positive correlations between relative heart volume and PEP (r = 0.59, P less than 0.01) and PEP/LVET ratio (r = 0.75, P less than 0.001). These results, while confirming the close correlation between STI and cardiac performance, seem to demonstrate that relative heart volumetry is a fairly accurate index of the cardiac conditions in non-valvular heart diseases.

Correlation between Systolic Time Intervals and Roentgen Findings in Normal Subjects and Cardiopathic Patients