Journal of hypertension
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Journal of hypertension · Jul 2011
Prevalence, awareness, treatment, control, and risk factors associated with hypertension in urban adults from 33 communities of China: the CHPSNE study.
To assess the prevalence, awareness, treatment, and control of hypertension and their associated factors in an urban Chinese population. ⋯ Hypertension is highly prevalent in the urban population of China, and the effects of being overweight/obesity on hypertension were much larger than any other examined factors. The percentage of hypertensive patients aware of their condition, receiving proper treatment, and keeping their hypertension under control is unacceptably low.
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Journal of hypertension · Jul 2011
Low-frequency fluctuations in heart rate, cardiac output and mean arterial pressure in humans: what are the physiological relationships?
Cardiovascular variability is a complex physiological phenomenon associated with the outcome of cardiovascular diseases. Blood pressure oscillations may cause cardiovascular complications, which, however, are also claimed to have antihypertensive effects. The physiological understanding is limited. This study evaluates whether oscillations in heart rate (HR) and cardiac output (CO) buffer fluctuations at approximately 0.1 Hz in arterial blood pressure (Mayer waves). ⋯ TPR oscillations produce fluctuations in MAP at 0.1 Hz. HRV produces CO variations, but CO variations do not efficiently buffer MAP variations during supine rest and mild ortostasis. Both feedback and feedforward mechanisms are responsible for the interaction between HR and MAP.