1 research outputs found
The normal ranges of cardiovascular parameters measured using the ultrasonic cardiac output monitor
The ultrasonic cardiac output monitor (USCOM) is a noninvasive transcutaneous continuous wave Doppler method for assessing hemodynamics. There are no published reference ranges for normal values in adults (aged 18β 60 years) for this device. This study aimed to (1) measure cardiovascular indices using USCOM in healthy adults aged 18β60 years; (2) combine these data with those for healthy children (aged 0β12), adolescents (aged 12β18), and the elderly (aged over 60) from our previously published studies in order to present normal ranges for all ages, and (3) establish normal ranges of USCOM-derived variables according to both weight and age. This was a population- based cross-sectional observational study of healthy Chinese subjects aged 0.5β89 years in Hong Kong. USCOM scans were performed on all subjects, to produce measurements including stroke volume, cardiac output, and systemic vascular resistance. Data from previously published studies (children, adolescents, and the elderly) were included. Normal ranges were defined as lying between the 2.5th and 97.5th percentiles. A total of 2218 subjects were studied (mean age = 16.4, range = 0.5β89; 52% male). From previous studies, 1197 children (aged 0β12, 55% male), 590 adolescents (aged 12β18, 49% male), and 77 elderly (aged 60β89, 55% male) were included. New data were collected from 354 adults aged 18β60 (47% male). Normal ranges are presented according to age and weight. We present comprehensive normal ranges for hemodynamic parameters obtained with USCOM in healthy subjects of all ages from infancy to the elderly