Depth of breathing and baroreflex sensitivity.
نویسندگان
چکیده
منابع مشابه
Comparison of Baroreflex Sensitivity Estimators using Spontaneous and Controlled Breathing
Baroreflex sensitivity (BRS) reflects the parallel fluctuations of arterial pressure and heart rate, determining the function of the arterial baroreflex. In this study the ECG and blood pressure were collected from healthy adult males (n=12) using spontaneous and controlled breathing at 0.25Hz. The BRS was analysed using sequence method, alpha coefficient and transfer function technique. The ob...
متن کاملBaroreflex sensitivity in the elderly: influence of age, breathing and spectral methods.
Baroreflex sensitivity (BRS) has been proposed as a diagnostic parameter for neurological disorders and as a survival-prognosis parameter in diabetic and cardiac patients. Therefore reference values and the reproducibility of BRS were assessed, taking into account the possible influence of age, gender, test conditions and some analysis variants. Healthy subjects (n=191) were randomly selected f...
متن کاملSlow breathing improves arterial baroreflex sensitivity and decreases blood pressure in essential hypertension.
Sympathetic hyperactivity and parasympathetic withdrawal may cause and sustain hypertension. This autonomic imbalance is in turn related to a reduced or reset arterial baroreflex sensitivity and chemoreflex-induced hyperventilation. Slow breathing at 6 breaths/min increases baroreflex sensitivity and reduces sympathetic activity and chemoreflex activation, suggesting a potentially beneficial ef...
متن کاملCardiovascular baroreflex sensitivity attenuates by cisplatin-induced toxicity in rats
Introduction: Cisplatin (CP) therapy may disturb cardiovascular system control. The objective of this study was to find baroreflex sensitivity (BRS) in CP-induced nephrotoxicity in rats. Materials and Methods: Eighteen male and female Wistar rats were randomly assigned to two groups treated with CP (2.5 mg/kg/day) and the vehicle, for five consecutive days, and then were subjected to surgical ...
متن کاملSlow breathing increases arterial baroreflex sensitivity in patients with chronic heart failure.
BACKGROUND It is well established that a depressed baroreflex sensitivity may adversely influence the prognosis in patients with chronic heart failure (CHF) and in those with previous myocardial infarction. METHODS AND RESULTS We tested whether a slow breathing rate (6 breaths/min) could modify the baroreflex sensitivity in 81 patients with stable (2 weeks) CHF (age, 58+/-1 years; NYHA classe...
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ژورنال
عنوان ژورنال: American Journal of Hypertension
سال: 1999
ISSN: 0895-7061
DOI: 10.1016/s0895-7061(99)80655-4