Value of vectorcardiography in predicting progress in dilated cardiomyopathy.

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Sixteen of 75 patients with dilated cardiomyopathy (DCM) died during a mean follow-up period of 39.7 months. In non-survivors, the cardiothoracic ratio and the left ventricular end-diastolic dimensions were greater, the left ventricular end-diastolic pressures were more elevated, and the cardiac index was lower than in the survivors at the time of initial diagnosis. There were no significant differences between survivors and non-survivors in the magnitude of the maximum QRS and T vectors or in the maximum T angle. In the non-survivors, the maximum QRS vector was directed more posteriorly and the width/length ratio of the loop in the horizontal plane was smaller than in survivors or showed bizarre figure-of eight configuration. It appears than in DCM a marked posterior displacement of a QRS loop that is narrow and distorted or is in a bizarre figure-of eight configuration in the horizontal plane indicates and unfavorable prognosis.
社団法人日本循環器学会の論文