Nocturnal Blood Pressure and Hypertension - Central and Peripheral 24-h Blood Pressure. (HOSA)
Nocturnal Blood Pressure in Hypertension, Obstructive Sleep Apnea and Healthy Subjects - Central and Peripheral 24-h Blood Pressure
A new study have shown that high night time blood pressure (BP) and/or non-dipping (lack of fall in BP during night time) is a strong predictor for the risk of cardiovascular disease and mortality in patients with hypertension. Three factors seem to affect the night time BP: chronic kidney disease, obstructive sleep apnea (OSA) and the way ambulatory blood pressure is monitored.
Hypothesis:
Central 24-h blood pressure monitoring is a better way of monitoring blood pressure than conventional peripheral monitoring.
In hypertension, chronic kidney disease and obstructive sleep apnea (OSA) the night time blood pressure is elevated, and is OSA the elevation is correlated to the severity of OSA.
In OSA the kidneys handling of salt and water is disturbed. In OSA there is disturbances in hormonal balance.
연구 개요
상태
상세 설명
75 patients with hypertension and chronic kidney disease (CKD I-II) and 75 healthy subjects is examined with both central and peripheral 24 hours blood pressure monitoring, 1 night home polygraphy to determine whether the subject has obstructive sleep apnea (OSA), and if so the degree (apnea hypopnea index, AHI), blood and urine samples to determine levels of urine aquaporine2 (u-AQP2), urine endothelial sodium channel (u-EnaC), plasma renin concentration (PRC), plasma angiotensin II (p-AngII), plasma aldosterone (p-aldosterone), plasma vasopressin (p-AVP) and plasma endothelin (p-endothelin).
Hypothesis:
Central 24-h BP monitoring provides another measure of daily fluctuations in blood pressure than peripheral 24-h BP monitoring, because this measurement is painless and does not interfere with activities in the daytime or night-time sleep.
In hypertension, chronic kidney disease and OSA the decease in nocturnal BP is lower than i healthy subjects.
In OSA the decrease in the nocturnal BP is inversely correlated with the severity of OSA.
In OSA is the renal tubular absorption of water and sodium abnormal with increased tubular absorption of water with AQP2 and of sodium by ENAC.
In OSA, there is increased activity of the renin-angiotensin-aldosterone system, increased endothelin in plasma and increased vasopressin in plasma.
연구 유형
등록 (예상)
연락처 및 위치
연구 장소
-
-
-
Holstebro, 덴마크, 7500
- Department of Medical Research and Medicine, Holstebro Regional Hospital
-
-
참여기준
자격 기준
공부할 수 있는 나이
건강한 자원 봉사자를 받아들입니다
연구 대상 성별
샘플링 방법
연구 인구
Group 1: 75 patients with hypertension, recruited from another study in the Holstebro Area, contacted by letter.
Group 2: healthy subjects are recruited though posters in public and private companies as well as advertising in local media.
설명
Group 1:
Inclusion Criteria:
- Chronic kidney disease (CKD stage I and II), estimated glomerule filtration rate (eGFR) 60-90 ml/min/1.73 m2 or eGFR> 90 ml/min/1.73 m2 and proteinuria or other signs of kidney damage.
- Hypertension (BP by ambulatory or home blood pressure> 135/85 mmHg, or consultation blood pressure> 140/90 mmHg).
- Both men and women
- 55-70 years
- A completed consent form
Exclusion Criteria:
- Lack of desire to participate
- In the treatment of OSA
- Malignant disease
- Abuse of drugs or alcohol
- Pregnant and breastfeeding
- Incompensated heart failure
- Atrial fibrillation
- Liver disease (Alanine aminotransferase (ALT)> 200)
- Severe chronic obstructive pulmonary disease (COPD) (Forced expiratory volume in 1 second <50% predicted)
- eGFR <60 ml/min/1.73 m2
- Blood pressure difference between the right and left arm> 10/10 mmHg
Group 2 - Healthy subjects
Inclusion Criteria:
- Healthy subjects men and women
- age 55 - 70 years
- Body mass index within the normal range, between 18.5 to 25.0 kg/m2
Exclusion Criteria:
Arterial hypertension, ambulatory blood pressure> 130 mmHg systolic and / or 80 mmHg diastolic.
- a history or clinical signs of cardial, pulmonary, hepato, renal, endocrine, cerebral or neoplastic disorders
- Alcohol abuse, ie. > 14 drinks / week for women and> 21/uge for men
- Substance abuse
- Medical treatment apart from oral contraceptives
- Smoking
- Pregnancy or breastfeeding
- Lack of desire to participate
- Clinically significant, discrepant results of blood or urine sample at inclusion study (B-hemoglobin and B-White blood cell count, p-sodium, p-potassium, p-creatinine, p-ALT, p-bilirubin , p-Alkaline phosphatase, p-cholesterol, p-albumin or b-glucose and urine for hematuria, albuminuria or glucosuria)
- Clinically significant variations in the electrocardiogram
- Blood Donation for the past month preceding the day on the first attempt sequence
- Blood pressure difference between the right and left arm> 10/10 mmHg.
공부 계획
연구는 어떻게 설계됩니까?
디자인 세부사항
코호트 및 개입
그룹/코호트 |
|---|
|
hypertension
75 patients with hypertension and chronic kidney disease (CKD stage I-II)
|
|
healthy subjects
75 healthy subjects
|
연구는 무엇을 측정합니까?
주요 결과 측정
결과 측정 |
측정값 설명 |
기간 |
|---|---|---|
|
decrease in central systolic blood pressure at night
기간: < 24 hours
|
The difference in the decrease in systolic BP at night by peripheral 24-h BP between patients with hypertension and healthy subjects.
|
< 24 hours
|
2차 결과 측정
결과 측정 |
측정값 설명 |
기간 |
|---|---|---|
|
decrease in central systolic blood pressure at night
기간: < 24 hours
|
The difference in the decrease in systolic BP at night by the central 24-h BP between patients with hypertension and healthy subjects.
|
< 24 hours
|
|
difference i blood pressure levels throughout the day
기간: < 24 hours
|
The difference in systolic blood pressure and diastolic blood pressure throughout the day, in the daytime and in nighttime between peripheral 24-h and central 24-h monitoring in both patients and healthy.
|
< 24 hours
|
|
The correlation between the decrease in nighttime BP on one side and severity of OSA and BP in the daytime on the other.
기간: < 24 hours
|
The correlation between the decrease in nighttime BP on one side and severity of OSA and BP in the daytime on the other.
|
< 24 hours
|
|
u-AQP2 and u-ENac
기간: 24 hours
|
In 24-h urine samples
|
24 hours
|
|
PRC, p-AngII, p-aldosterone, p-AVP, p-endothelin
기간: < 1 hour
|
blood samples
|
< 1 hour
|
공동 작업자 및 조사자
연구 기록 날짜
연구 주요 날짜
연구 시작
기본 완료 (예상)
연구 완료 (예상)
연구 등록 날짜
최초 제출
QC 기준을 충족하는 최초 제출
처음 게시됨 (추정)
연구 기록 업데이트
마지막 업데이트 게시됨 (추정)
QC 기준을 충족하는 마지막 업데이트 제출
마지막으로 확인됨
추가 정보
이 연구와 관련된 용어
추가 관련 MeSH 약관
기타 연구 ID 번호
- BGH-2-2013
- M-2013-303-13 (기타 식별자: The Regional Committee of health Reseach Ethics)
이 정보는 변경 없이 clinicaltrials.gov 웹사이트에서 직접 가져온 것입니다. 귀하의 연구 세부 정보를 변경, 제거 또는 업데이트하도록 요청하는 경우 register@clinicaltrials.gov. 문의하십시오. 변경 사항이 clinicaltrials.gov에 구현되는 즉시 저희 웹사이트에도 자동으로 업데이트됩니다. .