نتایج جستجو برای: pressure relationship

تعداد نتایج: 938226  

Journal: :Stroke 2003
P M Rothwell S C Howard J D Spence

BACKGROUND AND PURPOSE Blood pressure lowering in patients with a previous transient ischemic attack (TIA) or stroke reduces the risk of recurrent stroke and coronary vascular events. However, there is uncertainty about the risks and benefits in patients with severe carotid occlusive disease, particularly those with a carotid occlusion or bilateral > or =70% carotid stenosis in whom cerebral pe...

Journal: :Clinical science 1991
J N West P Gosling S B Dimmitt W A Littler

1. The effects of posture and exercise on the relationship between low-level urinary albumin excretion (microalbuminuria) and blood pressure was investigated in two groups of non-diabetic patients at increased cardiovascular risk: 21 otherwise healthy patients with untreated essential hypertension (blood pressure greater than 160/90 mmHg), and 14 age-matched patients with blood pressure at pres...

Journal: :Environmental Health Perspectives 1988
W R Harlan

Numerous observations have indicated a relationship between moderate or heavy lead exposure and high blood pressure. To determine whether low-level lead exposure is related to blood pressure in the U.S. population, we analyzed data from the National Health and Nutrition Examination Survey II for persons 12 to 74 years of age. Significant correlations were found between blood lead and blood pres...

Journal: :Technology and health care : official journal of the European Society for Engineering and Medicine 2015
Haiyan Xiang Yanyong Liu Yufei Qin Zhengtao Cao Tao Guo Mengsun Yu

BACKGROUND Korotkoff sounds have been used to measure systolic and diastolic arterial blood pressures noninvasively for over 100 years. However, most of the research concerning the Korotkoff sound were focused on the origin and frequency component analyzing the Korotkoff sound signal. OBJECTIVE To show that the occurrence time of the Korotkoff sounds for each cardiac cycle demonstrates a char...

Journal: :Investigative ophthalmology 1969
M Best R Pola M A Galin

The influence of common carotid occlusion on intraocular pressure was studied in rabbits by perfusion and tonographic techniques. Bilateral common carotid occlusion caused a greater ocular volume change than homolateral occlusion. If homolateral occlusion was followed by contralateral occlusion, there was consistently an additional fall in intraocular pressure. The initial fall in intraocular p...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه مازندران 1388

some researches made in the field of agency problem issue, deal with the role of control systems regarding owners and managers. in this research the relationship between the two control mechanisms, namely the voluntary disclosure (external control mechanism) and outside directors (internal control mechanism), which are reductive of agency problems, has been studied. for this reason, a sample ...

Hajieh Shahbazian, Leila Yazdanpanah, Seyed Mahmuod Latifi,

Objective: This study was done to explore the relationship between components of metabolic syndrome and smoking. Materials and Methods: In this analytical cross-sectional study in Ahvaz, south west of Iran, the gathering data sheet was completed. Body mass index, abdominal and waist circumference, Fasting Blood sugar, Triglyceride, total cholesterol, LDL and HDL levels, systolic and diastolic ...

Journal: :Journal of the American College of Cardiology 2009
Franz H Messerli Gurusher S Panjrath

The topic of the J-curve relationship between blood pressure and coronary artery disease (CAD) has been the subject of much controversy for the past decades. An inverse relationship between diastolic pressure and adverse cardiac ischemic events (i.e., the lower the diastolic pressure the greater the risk of coronary heart disease and adverse outcomes) has been observed in numerous studies. This...

Journal: :Chest 1998
E G Philippe J L Hébert C Coirault K Zamani Y Lecarpentier D Chemla

BACKGROUND Digital photoplethysmography is used to assess hemodynamic variability and baroreflex sensitivity. Numerous studies have critically evaluated the accuracy of the photoplethysmographic device against peripheral pressure. The aim of our study was to compare finger blood and aortic root pressure. METHODS We prospectively compared simultaneous recordings of systolic pressure at the aor...

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