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Original Article
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Volume 310:142-148 January 19, 1984 Number 3
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Physiologic abnormalities of cardiac function in progressive systemic sclerosis with diffuse scleroderma
WP Follansbee, EI Curtiss, TA Medsger, VD Steen, BF Uretsky, GR Owens, and GP Rodnan

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Abstract

To investigate cardiopulmonary function in progressive systemic sclerosis with diffuse scleroderma, we studied 26 patients with maximal exercise and redistribution thallium scans, rest and exercise radionuclide ventriculography, pulmonary-function testing, and chest roentgenography. Although only 6 patients had clinical evidence of cardiac involvement, 20 had abnormal thallium scans, including 10 with reversible exercise-induced defects and 18 with fixed defects (8 had both). Seven of the 10 patients who had exercise-induced defects and underwent cardiac catheterization had normal coronary angiograms. Mean resting left ventricular ejection fraction and mean resting right ventricular ejection fraction were lower in patients with post-exercise left ventricular thallium defect scores above the median (59 +/- 13 per cent vs. 69 +/- 6 per cent [P less than 0.025], and 36 +/- 12 per cent vs. 47 +/- 7 per cent [P less than 0.025], respectively). We conclude that in progressive systemic sclerosis with diffuse scleroderma, abnormalities of myocardial perfusion are common and appear to be due to a disturbance of the myocardial microcirculation. Both right and left ventricular dysfunction appear to be related to this circulatory disturbance, suggesting ischemically mediated injury.

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