View clinical trials related to Blood Pressure Disorders.
Filter by:Continuous blood pressure (BP) measurement is in use today with an ambulatory, sphygmomanometer-based, device. This device, also called BP Holter, gives essential data for the clinician, allowing better hypertension (HTN) diagnosis and treatment. Alongside, the device has some substantial limitations preventing its use as a longer term BP monitoring allowing better HTN control. A new method of continuous BP monitoring, based on photo plethysmography (PPG), has been invented to ease patients' use and increase their responsiveness. This study aims to check whether the new, PPG-based method, of BP measurement can be as good as the current, gold standard, sphygmomanometer-based device.
Hypertensive disorders of pregnancy (HDP) affect up to 10% of mother-infant dyads and account for 7.4% of cases of maternal mortality in the United States. Prompt recognition and treatment of hypertension remain one of the key features of management of mothers affected by these conditions. Up to 41% of severe morbidity and mortality from HDP occurs after 48 hours postpartum, as postpartum blood pressures tend to peak 3-6 days after birth. For these reasons, early postpartum follow-up is recommended for women diagnosed with HDP, in the form of blood pressure (BP) evaluation by a health care provider at 7-10 days postpartum (2-5 days post-discharge from maternity care). However, barriers to follow-up limit mothers' ability to adhere to this recommendation. A potential alternative to in-office evaluation is at-home BP monitoring. At-home BP monitoring is a novel, affordable method to empower, educate, and engage postpartum women affected by HDP. Within the obstetric (OB) population, pilot studies have demonstrated the feasibility and acceptability of remote BP monitoring. Hence, the purpose of this randomized trial is to empower postpartum women affected by HDP and cared for at North Carolina Women's Hospital to perform at-home BP monitoring with the aid of digital technology.
An assesment of an optical system that measures blood pressure on the finger -Elfor 1 device. The system is based on a small optical sensor that emits coherent light into the skin and collects the reflected light from the red blood cells in the blood vessels in the skin under the sensor. The sensor is able to detect the pulse wave and blood pressure can be measured. The investigators plan to measure blood pressure with the new sensor in patients who are attending the Hypertension Clinic at Meir Hospital or are undergoing hemodialysis to validate the sensor.
Emerging evidence suggests that there is a causal link between obstructive sleep apnea(OSA) and hypertension. Patient with this syndrome exhibit several characteristics: high prevalence, frequent non-dipper status, diastolic and nocturnal predominance, which are related to clinical and subclinical organ damage in heart and brain. However, the influence of OSA on nocturnal hypertension development has not yet been clarified. Blood pressure variability (BPV) plays a role in vascular damage, independent of blood pressure. Apnea overloads the autonomic cardiovascular control system and may influence BPV,which is classified by different time interval, including beat-to-beat, hour-to-hour day-to-night changes or long-term, for example days, weeks, months, seasons, and even years. All BPV abnormalities are associated with an increased incidence of cardiovascular events and mortality. The investigators pre-experiment estimate BPV by ambulatory blood pressure monitoring (ABPM), which unable to capture the BP fluctuation accurately during the apnea event. The small studies exam beat-to-beat BP and OSAļ¼and the investigators can't couple the events with blood fluctuation, also incapable calculate the correlation of them. This study is aimed to use pulse transmit time(PTT) based blood pressure measurement which can be useful for continuous monitoring of blood pressure to monitor nocturnal beat-to-beat blood pressure fluctuation in OSA with or without hypertension, investigating the degree of relevance between hypoxia, AHI, nocturnal hypertension development and BPV. Besides that the investigators also evaluate the effect of continuous positive airway pressure(CPAP) on blood pressure and nocturnal beat-to-beat BPV.