The Normal Value of Cardiac Output Determined by Doppler Ultrasound Technique and Effects of Some Factors on Cardiac Function in Adults Residing in the Kunming Area / 昆明医科大学学报

ABSTRACT

The normal value of cardiac output and relative indices of cardiac function were determined using Doppler ultrasound technique,by means of measurinp the blood flow velocity in the ascending aorta on a level with the suprasternal notch,in 358 healthy adults aged 20 to 81 years(mean 46?16)in the Kunming area.The diff- erences of the indices of the cardiac function among persons prouped on the basis of age were analysed.The effects of sex,body size and particularly aging and the changes of the aortic dimension,ejection time and heart rate associated with aging on the cardiac function were studied using the method of multivariate aoalysis.