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Angiology
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Changed Blood Rheology in Patients With Idiopathic Dilated Cardiomyopathy

Carl Gunnar Gustavsson

Department of Cardiology, University Hospital

Sylvi U. Persson

Department of Internal Medicine, University Hospital, Lund

Hans Larsson

Central Hospital, Växjö, Sweden

Stig Persson

Department of Cardiology, University Hospital

Rheologic properties of blood were studied in 8 patients with dilated car diomyopathy (DCM) and in 10 healthy subjects. Whole-blood viscosity was measured at four different shear rates, by means of a computer-controlled rota tional viscometer. The patients had significantly higher blood viscosity at all shear rates, both at their natural hematocrits and after an in vitro adjustment of sample hematocrits to 45%. Erythrocyte filterability (5 µm pore size) was significantly lower, fibrinogen concentration significantly higher, and HDL-cho lesterol concentration significantly lower in the patient group. No significant differences were found regarding hematocrit, mean corpuscular volume, hemo globin concentration, leukocyte count and filterability (8 µm pore size), plasma viscosity, and total cholesterol concentration.

The measured hemorheologic abnormalities may contribute to the previ ously reported reduction of coronary blood flow reserve in DCM patients and to myocardial microcirculatory disturbances, which have been suggested as a cause for DCM.

Angiology, Vol. 45, No. 2, 107-111 (1994)
DOI: 10.1177/000331979404500204
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