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To examine the vagal, vascular sympathetic, and mechno-structural components of baroreflex regulation in coronary artery disease (CAD) patients and healthy age-matched controls during rest and acute laboratory stress.
The strong association between mental stress and morbid cardiovascular events in coronary artery disease (CAD) patients may derive from stress-induced cardiac ischemia due to exaggerated increases in vascular resistance and arterial pressure. In fact, this may explain part of the prognostic relationship of baroreflex cardiac vagal control to cardiovascular outcome among CAD patients. The hemodynamic responses to psychological stress are buffered by the arterial baroreflex; thus, exaggerated pressor responses to mental stress may result from impaired baroreflex regulation in CAD patients.
The study has three components. The first component characterizes the relationships between vascular stiffness and baroreflex regulation among CAD patients, also contrasting healthy control subjects with CAD patients. The second component examines, in relation to individual differences in pharmacologically derived estimates of baroreflex function, changes in autonomic and baroreflex control during laboratory psychological stress among CAD patients and among healthy control subjects. The third component tests the hypothesis that impaired baroreflex regulation in CAD patients, due to increased vascular stiffness and/or attenuated autonomic control, is associated with exacerbated hemodynamic reactions to psychological stress. Bolus vasoactive drug infusions in combination with Finapres beat-by-beat arterial pressures and carotid B-mode ultrasonography are used to evaluate baroreflex sensitivity and arterial stiffness. Baroreflex adjustments to psychological stress are assessed by power spectral-derived relations between arterial pressure and cardiac chronotropy during a mental arithmetic task and a speech task. The degree to which indices of baroreflex function are associated with hemodynamic responses to psychological stress among CAD patients is assessed.
Observational Model: Case Control
National Heart, Lung, and Blood Institute (NHLBI)
Published on BioPortfolio: 2014-08-27T03:57:46-0400
Human immunodeficiency virus (HIV) infection has been associated with a variety of cardiovascular diseases. Even most industrialised countries exhibit a growing and aging population of HIV...
This study evaluates the effects of different volumes of aerobic exercise training in cardiovascular parameters of patients with cardiovascular diseases enrolled in a cardiac rehabilitatio...
The purpose of this study is to better understand the association between the postprandial biomarker responses after a food challenge with the development of cardiovascular diseases in hea...
To develop a comprehensive protocol for assessing cardiovascular reactivity to stressors, for use in epidemiological and clinical investigations of cardiovascular diseases in healthy popul...
The Silesian Cardiovascular Database is an observational study of all patients hospitalized due to cardiovascular diseases. The date include information on the clinical characteristics, tr...
Cardiovascular diseases possess a major cause for fatality and disability the world over. Since last several decades, the rates of cardiovascular diseases-related deaths have decreased in a number of ...
Although alexithymia has been suggested to be associated with cardiovascular diseases, studies are scarce and a causal relationship is questionable. This study explored the prospective association bet...
To examine the trend of cardiovascular diseases (CVD) risk factors among a Middle Eastern population with prevalent CVD during a median follow up of 12 years.
Cardiovascular disease is a primary cause of mortality worldwide. Therefore, it is of major interest to identify sensitive molecular markers that predict cardiovascular events and point to therapeutic...
Pathological conditions involving the CARDIOVASCULAR SYSTEM including the HEART; the BLOOD VESSELS; or the PERICARDIUM.
Methods and procedures for the diagnosis of diseases or dysfunction of the cardiovascular system or its organs or demonstration of their physiological processes.
Unexpected rapid natural death due to cardiovascular collapse within one hour of initial symptoms. It is usually caused by the worsening of existing heart diseases. The sudden onset of symptoms, such as CHEST PAIN and CARDIAC ARRHYTHMIAS, particularly VENTRICULAR TACHYCARDIA, can lead to the loss of consciousness and cardiac arrest followed by biological death. (from Braunwald's Heart Disease: A Textbook of Cardiovascular Medicine, 7th ed., 2005)
Dental care for patients with chronic diseases. These diseases include chronic cardiovascular, endocrinologic, hematologic, immunologic, neoplastic, and renal diseases. The concept does not include dental care for the mentally or physically disabled which is DENTAL CARE FOR DISABLED.
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Blood is a specialized bodily fluid that delivers necessary substances to the body's cells (in animals) – such as nutrients and oxygen – and transports waste products away from those same cells. In vertebrates, it is composed of blo...
Within medicine, nutrition (the study of food and the effect of its components on the body) has many different roles. Appropriate nutrition can help prevent certain diseases, or treat others. In critically ill patients, artificial feeding by tubes need t...