Hypotension. Medical search

Abnormally low BLOOD PRESSURE that can result in inadequate blood flow to the brain and other vital organs. Common symptom is DIZZINESS but greater negative impacts on the body occur when there is prolonged depravation of oxygen and nutrients.

Procedure in which arterial blood pressure is intentionally reduced in order to control blood loss during surgery. This procedure is performed either pharmacologically or by pre-surgical removal of blood.

A significant drop in BLOOD PRESSURE after assuming a standing position. Orthostatic hypotension is a finding, and defined as a 20-mm Hg decrease in systolic pressure or a 10-mm Hg decrease in diastolic pressure 3 minutes after the person has risen from supine to standing. Symptoms generally include DIZZINESS, blurred vision, and SYNCOPE.

Reduction of CEREBROSPINAL FLUID pressure characterized clinically by HEADACHE which is maximal in an upright posture and occasionally by an abducens nerve palsy (see ABDUCENS NERVE DISEASES), neck stiffness, hearing loss (see DEAFNESS); NAUSEA; and other symptoms. This condition may be spontaneous or secondary to SPINAL PUNCTURE; NEUROSURGICAL PROCEDURES; DEHYDRATION; UREMIA; trauma (see also CRANIOCEREBRAL TRAUMA); and other processes. Chronic hypotension may be associated with subdural hematomas (see HEMATOMA, SUBDURAL) or hygromas. (From Semin Neurol 1996 Mar;16(1):5-10; Adams et al., Principles of Neurology, 6th ed, pp637-8)

PRESSURE of the BLOOD on the ARTERIES and other BLOOD VESSELS.

Transient reduction in blood pressure levels immediately after exercises that lasts 2-12 hours. The reduction varies but is typically 5-20 mm Hg when compared to pre-exercise levels. It exists both in normotensive and hypertensive individuals and may play a role in excercise related PHYSIOLOGIC ADAPTATION.

A nicotinic antagonist that has been used as a ganglionic blocker in hypertension, as an adjunct to anesthesia, and to induce hypotension during surgery.

Cardiac arrhythmias that are characterized by excessively slow HEART RATE, usually below 50 beats per minute in human adults. They can be classified broadly into SINOATRIAL NODE dysfunction and ATRIOVENTRICULAR BLOCK.

The number of times the HEART VENTRICLES contract per unit of time, usually per minute.

A phenethylamine found in EPHEDRA SINICA. PSEUDOEPHEDRINE is an isomer. It is an alpha- and beta-adrenergic agonist that may also enhance release of norepinephrine. It has been used for asthma, heart failure, rhinitis, and urinary incontinence, and for its central nervous system stimulatory effects in the treatment of narcolepsy and depression. It has become less extensively used with the advent of more selective agonists.

Procedure in which an anesthetic is injected directly into the spinal cord.

A variety of anesthetic methods such as EPIDURAL ANESTHESIA used to control the pain of childbirth.

The movement and the forces involved in the movement of the blood through the CARDIOVASCULAR SYSTEM.

Diseases of the parasympathetic or sympathetic divisions of the AUTONOMIC NERVOUS SYSTEM; which has components located in the CENTRAL NERVOUS SYSTEM and PERIPHERAL NERVOUS SYSTEM. Autonomic dysfunction may be associated with HYPOTHALAMIC DISEASES; BRAIN STEM disorders; SPINAL CORD DISEASES; and PERIPHERAL NERVOUS SYSTEM DISEASES. Manifestations include impairments of vegetative functions including the maintenance of BLOOD PRESSURE; HEART RATE; pupil function; SWEATING; REPRODUCTIVE AND URINARY PHYSIOLOGY; and DIGESTION.

A pathological condition manifested by failure to perfuse or oxygenate vital organs.

A state characterized by loss of feeling or sensation. This depression of nerve function is usually the result of pharmacologic action and is induced to allow performance of surgery or other painful procedures.

Sepsis associated with HYPOTENSION or hypoperfusion despite adequate fluid resuscitation. Perfusion abnormalities may include, but are not limited to LACTIC ACIDOSIS; OLIGURIA; or acute alteration in mental status.

An ethanolamine derivative that is an adrenergic alpha-1 agonist. It is used as a vasoconstrictor agent in the treatment of HYPOTENSION.

The circulation of blood through the BLOOD VESSELS of the BRAIN.

The force that opposes the flow of BLOOD through a vascular bed. It is equal to the difference in BLOOD PRESSURE across the vascular bed divided by the CARDIAC OUTPUT.

A powerful vasodilator used in emergencies to lower blood pressure or to improve cardiac function. It is also an indicator for free sulfhydryl groups in proteins.

Abnormally low intraocular pressure often related to chronic inflammation (uveitis).

The volume of BLOOD passing through the HEART per unit of time. It is usually expressed as liters (volume) per minute so as not to be confused with STROKE VOLUME (volume per beat).

An abnormally low volume of blood circulating through the body. It may result in hypovolemic shock (see SHOCK).

Inorganic salts of the hypothetical acid, H3Fe(CN)6.

A transient loss of consciousness and postural tone caused by diminished blood flow to the brain (i.e., BRAIN ISCHEMIA). Presyncope refers to the sensation of lightheadedness and loss of strength that precedes a syncopal event or accompanies an incomplete syncope. (From Adams et al., Principles of Neurology, 6th ed, pp367-9)

A progressive neurodegenerative condition of the central and autonomic nervous systems characterized by atrophy of the preganglionic lateral horn neurons of the thoracic spinal cord. This disease is generally considered a clinical variant of MULTIPLE SYSTEM ATROPHY. Affected individuals present in the fifth or sixth decade with ORTHOSTASIS and bladder dysfunction; and later develop FECAL INCONTINENCE; anhidrosis; ATAXIA; IMPOTENCE; and alterations of tone suggestive of basal ganglia dysfunction. (From Adams et al., Principles of Neurology, 6th ed, p536)

A degenerative disease of the AUTONOMIC NERVOUS SYSTEM that is characterized by idiopathic ORTHOSTATIC HYPOTENSION and a greatly reduced level of CATECHOLAMINES. No other neurological deficits are present.

The injection of autologous blood into the epidural space either as a prophylactic treatment immediately following an epidural puncture or for treatment of headache as a result of an epidural puncture.

The position or attitude of the body.

Complications that affect patients during surgery. They may or may not be associated with the disease for which the surgery is done, or within the same surgical procedure.

Leakage and accumulation of CEREBROSPINAL FLUID in the subdural space which may be associated with an infectious process; CRANIOCEREBRAL TRAUMA; BRAIN NEOPLASMS; INTRACRANIAL HYPOTENSION; and other conditions.

A standard and widely accepted diagnostic test used to identify patients who have a vasodepressive and/or cardioinhibitory response as a cause of syncope. (From Braunwald, Heart Disease, 7th ed)

Pressure within the cranial cavity. It is influenced by brain mass, the circulatory system, CSF dynamics, and skull rigidity.

Drugs used to cause constriction of the blood vessels.

Acute hemorrhage or excessive fluid loss resulting in HYPOVOLEMIA.

The HEART and the BLOOD VESSELS by which BLOOD is pumped and circulated through the body.

Therapy whose basic objective is to restore the volume and composition of the body fluids to normal with respect to WATER-ELECTROLYTE BALANCE. Fluids may be administered intravenously, orally, by intermittent gavage, or by HYPODERMOCLYSIS.

Bleeding or escape of blood from a vessel.

The thoracolumbar division of the autonomic nervous system. Sympathetic preganglionic fibers originate in neurons of the intermediolateral column of the spinal cord and project to the paravertebral and prevertebral ganglia, which in turn project to target organs. The sympathetic nervous system mediates the body's response to stressful situations, i.e., the fight or flight reactions. It often acts reciprocally to the parasympathetic system.

The domestic dog, Canis familiaris, comprising about 400 breeds, of the carnivore family CANIDAE. They are worldwide in distribution and live in association with people. (Walker's Mammals of the World, 5th ed, p1065)

Volume of circulating BLOOD. It is the sum of the PLASMA VOLUME and ERYTHROCYTE VOLUME.

Extraction of the FETUS by means of abdominal HYSTEROTOMY.

An alpha-2 adrenergic agonist that has both central and peripheral nervous system effects. Its primary clinical use is as an antihypertensive agent.

Procedure in which an anesthetic is injected into the epidural space.

The ENTERIC NERVOUS SYSTEM; PARASYMPATHETIC NERVOUS SYSTEM; and SYMPATHETIC NERVOUS SYSTEM taken together. Generally speaking, the autonomic nervous system regulates the internal environment during both peaceful activity and physical or emotional stress. Autonomic activity is controlled and integrated by the CENTRAL NERVOUS SYSTEM, especially the HYPOTHALAMUS and the SOLITARY NUCLEUS, which receive information relayed from VISCERAL AFFERENTS.

The study of systems, particularly electronic systems, which function after the manner of, in a manner characteristic of, or resembling living systems. Also, the science of applying biological techniques and principles to the design of electronic systems.

Solutions having the same osmotic pressure as blood serum, or another solution with which they are compared. (From Grant & Hackh's Chemical Dictionary, 5th ed & Dorland, 28th ed)

Receptors in the vascular system, particularly the aorta and carotid sinus, which are sensitive to stretch of the vessel walls.

An alpha-1 adrenergic agonist used as a mydriatic, nasal decongestant, and cardiotonic agent.

Precursor of epinephrine that is secreted by the adrenal medulla and is a widespread central and autonomic neurotransmitter. Norepinephrine is the principal transmitter of most postganglionic sympathetic fibers and of the diffuse projection system in the brain arising from the locus ceruleus. It is also found in plants and is used pharmacologically as a sympathomimetic.

The flow of BLOOD through or around an organ or region of the body.

Elements of limited time intervals, contributing to particular results or situations.

A response by the BARORECEPTORS to increased BLOOD PRESSURE. Increased pressure stretches BLOOD VESSELS which activates the baroreceptors in the vessel walls. The net response of the CENTRAL NERVOUS SYSTEM is a reduction of central sympathetic outflow. This reduces blood pressure both by decreasing peripheral VASCULAR RESISTANCE and by lowering CARDIAC OUTPUT. Because the baroreceptors are tonically active, the baroreflex can compensate rapidly for both increases and decreases in blood pressure.

Drugs used in the treatment of acute or chronic vascular HYPERTENSION regardless of pharmacological mechanism. Among the antihypertensive agents are DIURETICS; (especially DIURETICS, THIAZIDE); ADRENERGIC BETA-ANTAGONISTS; ADRENERGIC ALPHA-ANTAGONISTS; ANGIOTENSIN-CONVERTING ENZYME INHIBITORS; CALCIUM CHANNEL BLOCKERS; GANGLIONIC BLOCKERS; and VASODILATOR AGENTS.

The circulation of blood through the BLOOD VESSELS supplying the abdominal VISCERA.

An imidazoline sympatholytic agent that stimulates ALPHA-2 ADRENERGIC RECEPTORS and central IMIDAZOLINE RECEPTORS. It is commonly used in the management of HYPERTENSION.

The physiological widening of BLOOD VESSELS by relaxing the underlying VASCULAR SMOOTH MUSCLE.

The porcine antidiuretic hormone (VASOPRESSINS). It is a cyclic nonapeptide that differs from ARG-VASOPRESSIN by one amino acid, containing a LYSINE at residue 8 instead of an ARGININE. Lys-vasopressin is used to treat DIABETES INSIPIDUS or to improve vasomotor tone and BLOOD PRESSURE.

The relationship between the dose of an administered drug and the response of the organism to the drug.

Any liquid used to replace blood plasma, usually a saline solution, often with serum albumins, dextrans or other preparations. These substances do not enhance the oxygen- carrying capacity of blood, but merely replace the volume. They are also used to treat dehydration.

Loss of consciousness due to a reduction in blood pressure that is associated with an increase in vagal tone and peripheral vasodilation.

The long-term (minutes to hours) administration of a fluid into the vein through venipuncture, either by letting the fluid flow by gravity or by pumping it.

A strain of albino rat used widely for experimental purposes because of its calmness and ease of handling. It was developed by the Sprague-Dawley Animal Company.

A synthetic mineralocorticoid with anti-inflammatory activity.

Forced expiratory effort against a closed GLOTTIS.

Therapy for the insufficient cleansing of the BLOOD by the kidneys based on dialysis and including hemodialysis, PERITONEAL DIALYSIS, and HEMODIAFILTRATION.

A direct-acting vasodilator that is used as an antihypertensive agent.

A stable, non-explosive inhalation anesthetic, relatively free from significant side effects.

Injections made into a vein for therapeutic or experimental purposes.

A widely used local anesthetic agent.

An involuntary movement or exercise of function in a part, excited in response to a stimulus applied to the periphery and transmitted to the brain or spinal cord.

The posture of an individual lying face up.

Observation of a population for a sufficient number of persons over a sufficient number of years to generate incidence or mortality rates subsequent to the selection of the study group.

Procedure in which patients are induced into an unconscious state through use of various medications so that they do not feel pain during surgery.

Persistently high systemic arterial BLOOD PRESSURE. Based on multiple readings (BLOOD PRESSURE DETERMINATION), hypertension is currently defined as when SYSTOLIC PRESSURE is consistently greater than 140 mm Hg or when DIASTOLIC PRESSURE is consistently 90 mm Hg or more.

Drugs used to cause dilation of the blood vessels.

A condition caused by the failure of body to dissipate heat in an excessively hot environment or during PHYSICAL EXERTION in a hot environment. Contrast to HEAT EXHAUSTION, the body temperature in heat stroke patient is dangerously high with red, hot skin accompanied by DELUSIONS; CONVULSIONS; or COMA. It can be a life-threatening emergency and is most common in infants and the elderly.

An acute hypersensitivity reaction due to exposure to a previously encountered ANTIGEN. The reaction may include rapidly progressing URTICARIA, respiratory distress, vascular collapse, systemic SHOCK, and death.

Abnormally rapid heartbeat, usually with a HEART RATE above 100 beats per minute for adults. Tachycardia accompanied by disturbance in the cardiac depolarization (cardiac arrhythmia) is called tachyarrhythmia.

The constant checking on the state or condition of a patient during the course of a surgical operation (e.g., checking of vital signs).

The restoration to life or consciousness of one apparently dead. (Dorland, 27th ed)

Method for determining the circulating blood volume by introducing a known quantity of foreign substance into the blood and determining its concentration some minutes later when thorough mixing has occurred. From these two values the blood volume can be calculated by dividing the quantity of injected material by its concentration in the blood at the time of uniform mixing. Generally expressed as cubic centimeters or liters per kilogram of body weight.

The blood pressure in the ARTERIES. It is commonly measured with a SPHYGMOMANOMETER on the upper arm which represents the arterial pressure in the BRACHIAL ARTERY.

Measurement of oxygen and carbon dioxide in the blood.

Evaluation undertaken to assess the results or consequences of management and procedures used in combating disease in order to determine the efficacy, effectiveness, safety, and practicability of these interventions in individual cases or series.

X-ray visualization of the spinal cord following injection of contrast medium into the spinal arachnoid space.

Volume of PLASMA in the circulation. It is usually measured by INDICATOR DILUTION TECHNIQUES.

A nonflammable, halogenated, hydrocarbon anesthetic that provides relatively rapid induction with little or no excitement. Analgesia may not be adequate. NITROUS OXIDE is often given concomitantly. Because halothane may not produce sufficient muscle relaxation, supplemental neuromuscular blocking agents may be required. (From AMA Drug Evaluations Annual, 1994, p178)

The combination of hemodialysis and hemofiltration either simultaneously or sequentially. Convective transport (hemofiltration) may be better for removal of larger molecular weight substances and diffusive transport (hemodialysis) for smaller molecular weight solutes.

The processes whereby the internal environment of an organism tends to remain balanced and stable.

The part of CENTRAL NERVOUS SYSTEM that is contained within the skull (CRANIUM). Arising from the NEURAL TUBE, the embryonic brain is comprised of three major parts including PROSENCEPHALON (the forebrain); MESENCEPHALON (the midbrain); and RHOMBENCEPHALON (the hindbrain). The developed brain consists of CEREBRUM; CEREBELLUM; and other structures in the BRAIN STEM.

The symptom of PAIN in the cranial region. It may be an isolated benign occurrence or manifestation of a wide variety of HEADACHE DISORDERS.

The blood pressure in the central large VEINS of the body. It is distinguished from peripheral venous pressure which occurs in an extremity.

Agents having as their major action the interruption of neural transmission at nicotinic receptors on postganglionic autonomic neurons. Because their actions are so broad, including blocking of sympathetic and parasympathetic systems, their therapeutic use has been largely supplanted by more specific drugs. They may still be used in the control of blood pressure in patients with acute dissecting aortic aneurysm and for the induction of hypotension in surgery.

A free radical gas produced endogenously by a variety of mammalian cells, synthesized from ARGININE by NITRIC OXIDE SYNTHASE. Nitric oxide is one of the ENDOTHELIUM-DEPENDENT RELAXING FACTORS released by the vascular endothelium and mediates VASODILATION. It also inhibits platelet aggregation, induces disaggregation of aggregated platelets, and inhibits platelet adhesion to the vascular endothelium. Nitric oxide activates cytosolic GUANYLATE CYCLASE and thus elevates intracellular levels of CYCLIC GMP.

An autosomal disorder of the peripheral and autonomic nervous systems limited to individuals of Ashkenazic Jewish descent. Clinical manifestations are present at birth and include diminished lacrimation, defective thermoregulation, orthostatic hypotension (HYPOTENSION, ORTHOSTATIC), fixed pupils, excessive SWEATING, loss of pain and temperature sensation, and absent reflexes. Pathologic features include reduced numbers of small diameter peripheral nerve fibers and autonomic ganglion neurons. (From Adams et al., Principles of Neurology, 6th ed, p1348; Nat Genet 1993;4(2):160-4)

Antidiuretic hormones released by the NEUROHYPOPHYSIS of all vertebrates (structure varies with species) to regulate water balance and OSMOLARITY. In general, vasopressin is a nonapeptide consisting of a six-amino-acid ring with a cysteine 1 to cysteine 6 disulfide bridge or an octapeptide containing a CYSTINE. All mammals have arginine vasopressin except the pig with a lysine at position 8. Vasopressin, a vasoconstrictor, acts on the KIDNEY COLLECTING DUCTS to increase water reabsorption, increase blood volume and blood pressure.

The active sympathomimetic hormone from the ADRENAL MEDULLA. It stimulates both the alpha- and beta- adrenergic systems, causes systemic VASOCONSTRICTION and gastrointestinal relaxation, stimulates the HEART, and dilates BRONCHI and cerebral vessels. It is used in ASTHMA and CARDIAC FAILURE and to delay absorption of local ANESTHETICS.

A potent narcotic analgesic, abuse of which leads to habituation or addiction. It is primarily a mu-opioid agonist. Fentanyl is also used as an adjunct to general anesthetics, and as an anesthetic for induction and maintenance. (From Martindale, The Extra Pharmacopoeia, 30th ed, p1078)

A strain of albino rat developed at the Wistar Institute that has spread widely at other institutions. This has markedly diluted the original strain.

Anesthesia caused by the breathing of anesthetic gases or vapors or by insufflating anesthetic gases or vapors into the respiratory tract.

Nitric oxide limits the eicosanoid-dependent bronchoconstriction and hypotension induced by endothelin-1 in the guinea-pig. (1/1770)

1. This study attempts to investigate if endogenous nitric oxide (NO) can modulate the eicosanoid-releasing properties of intravenously administered endothelin-1 (ET-1) in the pulmonary and circulatory systems in the guinea-pig. 2. The nitric oxide synthase blocker N(omega)-nitro-L-arginine methyl ester (L-NAME; 300 microM; 30 min infusion) potentiated, in an L-arginine sensitive fashion, the release of thromboxane A2 (TxA2) stimulated by ET-1, the selective ET(B) receptor agonist IRL 1620 (Suc-[Glu9,Ala11,15]-ET-1(8-21)) or bradykinin (BK) (5, 50 and 50 nM, respectively, 3 min infusion) in guinea-pig isolated and perfused lungs. 3. In anaesthetized and ventilated guinea-pigs intravenous injection of ET-1 (0.1-1.0 nmol kg(-1)), IRL 1620 (0.2-1.6 nmol kg(-1)), BK (1.0-10.0 nmol kg(-1)) or U 46619 (0.2-5.7 nmol kg(-1)) each induced dose-dependent increases in pulmonary insufflation pressure (PIP). Pretreatment with L-NAME (5 mg kg(-1)) did not change basal PIP, but increased, in L-arginine sensitive manner, the magnitude of the PIP increases (in both amplitude and duration) triggered by each of the peptides (at 0.25, 0.4 and 1.0 nmol kg(-1), respectively), without modifying bronchoconstriction caused by U 46619 (0.57 nmol kg(-1)). 4. The increases in PIP induced by ET-1, IRL 1620 (0.25 and 0.4 nmol kg(-1), respectively) or U 46619 (0.57 nmol kg(-1)) were accompanied by rapid and transient increases of mean arterial blood pressure (MAP). Pretreatment with L-NAME (5 mg kg(-1); i.v. raised basal MAP persistently and, under this condition, subsequent administration of ET-1 or IRL 1620, but not of U-46619, induced hypotensive responses which were prevented by pretreatment with the cyclo-oxygenase inhibitor indomethacin. 5. Thus, endogenous NO appears to modulate ET-1-induced bronchoconstriction and pressor effects in the guinea-pig by limiting the peptide's ability to induce, possibly via ET(B) receptors, the release of TxA2 in the lungs and of vasodilatory prostanoids in the systemic circulation. Furthermore, it would seem that these eicosanoid-dependent actions of ET-1 in the pulmonary system and on systemic arterial resistance in this species are physiologically dissociated. (+info)

The Janus-faced aspect of 'dry weight'. (2/1770)

BACKGROUND: The goal of haemodialysis treatment in end-stage renal disease (ESRD) patients is to correct the complications of the uraemic condition. Among the main complications are fluid overload and subsequent hypertension that are corrected by achievement of 'dry weight'. We report in this study the evolution of post-dialysis body-weight and blood pressure in patients who began their HD treatment in our unit. METHODS: We studied the monthly evolution of post-dialysis body-weight (expressed as a percentage of pre-dialysis body-weight at the first HD treatment) and predialysis mean arterial pressure (MAP) over 24 months in 61 patients (21 females, mean age 59.8 years; 20% diabetic), treated with cellulosic membranes for 8 h, 3 times a week. RESULTS: The post-dialysis body-weight decreased between the onset of HD and month 2 (M2) (-4.40+/-0.52%). Then it went up, reaching -1.56+/-0.96% at M6, +0.3+/-1.27% at M12, +1.27+/-1.38% at M18 and +1.64+/-1.33% at M24. The post-dialysis body-weight increased by 6% between M2 and M24. The mean arterial pressure (MAP) decreased from 111.3+/-2.5 mmHg at M0 to 94.4+/-1.7 at M6, and then remained stable after M6. Between M2 and M6 the post-dialysis body-weight increased, whereas the predialysis MAP continued to decline. The incidence of hypotension episodes was maximal during the first 4 months of HD treatment. CONCLUSIONS: After the second month of dialysis treatment, the simultaneous increase of post-dialysis body-weight and decrease of pre-dialysis MAP are related to the effects of two processes, i.e. increased weight as the result of anabolism induced by the HD treatment on the one hand and normalization of blood pressure by fluid removal on the other. Continuous clinical assessment of the patient is necessary to provide adequate prescription of post-dialysis body-weight. During the first months of HD treatment, the nephrologist, like Janus, is a double-faced gatekeeper: he must be willing to decrease post-dialysis weight to achieve 'dry weight' and to normalize blood pressure, but he must also be prepared to increase it to compensate for anabolism and to avoid episodes of hypotension. (+info)

Hypotension induced by exercise is associated with enhanced release of adenyl purines from aged rat artery. (3/1770)

To determine whether the antihypertensive effects of exercise are associated with release of ATP and its metabolites from arteries, we assayed blood pressure and the release of adenine nucleotides and nucleosides from the caudal arteries of exercised and sedentary aged hypercholesterolemic rats. Exercise on a treadmill for 12 wk significantly decreased the rise in systolic and diastolic blood pressure by 7.5 and 15.9%, respectively, with advanced age. The concentrations of oleic, linoleic, and linolenic acids in the caudal artery decreased significantly with exercise, demonstrating an association between exercise and the unsaturation index of caudal arterial fatty acids. The amounts of total adenyl purines released by the arterial segments from exercised rats, both spontaneously and in response to norepinephrine, were significantly greater by 80.0 and 60.7%, respectively, than those released by tissues from sedentary rats. These results suggest that exercise alters the membrane fatty acid composition in aged rats as well as the release of ATP from vascular endothelial cells and that these factors are associated with the regression of the rise in blood pressure normally observed with advanced age. (+info)

Mediation of humoral catecholamine secretion by the renin-angiotensin system in hypotensive rainbow trout (Oncorhynchus mykiss). (4/1770)

The individual contributions of, and potential interactions between, the renin-angiotensin system (RAS) and the humoral adrenergic stress response to blood pressure regulation were examined in rainbow trout. Intravenous injection of the smooth muscle relaxant, papaverine (10 mg/kg), elicited a transient decrease in dorsal aortic blood pressure (PDA) and systemic vascular resistance (RS), and significant increases in plasma angiotensin II (Ang II) and catecholamine concentrations. Blockade of alpha-adrenoceptors before papaverine treatment prevented PDA and RS recovery, had no effect on the increase in plasma catecholamines, and resulted in greater plasma Ang II concentrations. Administration of the angiotensin-converting enzyme inhibitor, lisinopril (10(-4) mol/kg), before papaverine treatment attenuated the increases in the plasma concentrations of Ang II, adrenaline, and noradrenaline by 90, 79, and 40%, respectively and also prevented PDA and RS recovery. By itself, lisinopril treatment caused a gradual and sustained decrease in PDA and RS, and reductions in basal plasma Ang II and adrenaline concentrations. Bolus injection of a catecholamine cocktail (4 nmol/kg noradrenaline plus 40 nmol/kg adrenaline) in the lisinopril+papaverine-treated trout, to supplement their circulating catecholamine concentrations and mimic those observed in fish treated only with papaverine, resulted in a temporary recovery in PDA and RS. These results indicate that the RAS and the acute humoral adrenergic response are both recruited during an acute hypotensive stress, and have important roles in the compensatory response to hypotension in rainbow trout. However, whereas the contribution of the RAS to PDA recovery is largely indirect and relies on an Ang II-mediated secretion of catecholamines, the contribution from the adrenergic system is direct and relies at least in part on plasma catecholamines. (+info)

Sudden death in hypertrophic cardiomyopathy: potential importance of altered autonomic control of vasculature. (5/1770)

Current evidence suggests that alterations in the autonomic function and abnormal vascular control play a significant role either as independent triggers themselves or as modifiers of ischaemia and tolerance to to arrhythmias. A combination of several factors--that is, arrhythmia, hypotension, altered autonomic function including vascular control, and ischaemia are therefore likely to act as triggers for sudden death. The relative contribution of each of these factors needs further detailed study. (+info)

Effects of isoflurane anesthesia on pulmonary vascular response to K+ ATP channel activation and circulatory hypotension in chronically instrumented dogs. (6/1770)

BACKGROUND: The objective of this study was to evaluate the effects of isoflurane anesthesia on the pulmonary vascular responses to exogenous adenosine triphosphate-sensitive potassium (K+ ATP) channel activation and circulatory hypotension compared with responses measured in the conscious state. In addition, the extent to which K+ ATP channel inhibition modulates the pulmonary vascular response to circulatory hypotension in conscious and isoflurane-anesthetized dogs was assessed. METHODS: Fifteen conditioned, male mongrel dogs were fitted with instruments for long-term monitoring to measure the left pulmonary vascular pressure-flow relation. The dose-response relation to the K+ ATP channel agonist, lemakalim, and the pulmonary vascular response to circulatory hypotension were assessed in conscious and isoflurane-anesthetized (approximately 1.2 minimum alveolar concentration) dogs. The effect of the selective K+ ATP channel antagonist, glibenclamide, on the pulmonary vascular response to hypotension was also assessed in conscious and isoflurane-anesthetized dogs. RESULTS: Isoflurane had no effect on the baseline pulmonary circulation, but it attenuated (P<0.05) the pulmonary vasodilator response to lemakalim. Reducing the mean systemic arterial pressure to approximately 50 mm Hg resulted in pulmonary vasoconstriction (P<0.05) in the conscious state, and this response was attenuated (P<0.05) during isoflurane. Glibenclamide had no effect on the baseline pulmonary circulation, but it potentiated (P<0.05) the pulmonary vasoconstrictor response to hypotension in conscious and isoflurane-anesthetized dogs. CONCLUSIONS: These results indicate that K+ ATP-mediated pulmonary vasodilation and the pulmonary vasoconstrictor response to hypotension are attenuated during isoflurane anesthesia. Endogenous K+ ATP channel activation modulates the pulmonary vasoconstrictor response to hypotension in the conscious state, and this effect is preserved during isoflurane anesthesia. (+info)

Spike generation from dorsal roots and cutaneous afferents by hypoxia or hypercapnia in the rat in vivo. (7/1770)

The present study aimed at investigating the responsiveness of different parts of the primary afferent neurones to a brief hypoxia, hypercapnia or ischaemia under in vivo conditions. Action potentials were recorded in separate groups of anaesthetized rats from (i) the peripheral end of the central stump of the cut L3, L4 or L5 dorsal root (dorsal root preparation); (ii) the central end of the peripheral stump of the cut saphenous nerve (saphenous-receptor preparation); (iii) the distal end of a segment of the saphenous nerve cut at both ends (axon preparation). In paralysed animals interruption of artificial ventilation for 20-60 s elicited or increased the frequency of action potentials in both the dorsal root and saphenous-receptor preparations. Activation of these preparations was also achieved by inspiration of gas mixtures containing 10-0% oxygen (mixed with nitrogen) or 20-50% carbon dioxide (mixed with oxygen) which elicited in the blood a decrease in PO2 or an increase in PCO2 with a fall in pH. Occlusion of the femoral artery for 3 min also caused spike generation in the saphenous-receptor preparations with little alteration in blood pressure. All these stimuli failed to evoke action potentials in the axon preparations. Systemic (300 mg kg-1 s.c.) or perineural (2%) capsaicin pretreatment failed to inhibit the effect of hypoxia, hypercapnia or ischaemia, indicating a significant contribution of capsaicin-insensitive neurones to the responses. It is concluded that central and peripheral terminals but not axons of primary afferent neurones are excited by a brief hypoxia or hypercapnia and the peripheral terminals by a short local ischaemia as well. Excitation of central terminals by hypoxia or hypercapnia revealed in this way an antidromic activation of dorsal roots in response to natural chemical stimuli. (+info)

Effects of phosphodiesterase inhibitors after coronary artery bypass grafting. (8/1770)

The aim of this study was to estimate the postoperative effects of phosphodiesterase (PDE) inhibitors (milrinone and olprinone) after coronary artery bypass grafting (CABG). To prevent hypotension caused by the PDE inhibitors, low dose of catecholamines were used concomitantly. A total of 34 elective CABG cases were tested. In 12 cases, 0.25 microg kg(-1) min(-1) of milrinone, 3 microg kg(-1) min(-1) of dobutamine (DOB) and dopamine (DOA) were used concomitantly (Group-M). In another 10 patients, 0.1 microg kg(-1) min(-1) of olprinone and the same doses of the catecholamines were infused (Group-O). As a control, the same doses of DOA and DOB only were administered in 12 patients (Group-C). When the pump flow of the cardiopulmonary bypass (CPB) decreased to half, these drugs were given in all groups. Hemodynamics were recorded before CPB, just after the operation, and 3, 6, 12, 24, 48 and 72 h after the operation. Both milrinone and olprinone increased the cardiac index and decreased systemic vascular resistance to almost the same degree. Olprinone decreased mean aortic and pulmonary artery pressures, and also significantly reduced the preload of both right and left heart compared with milrinone. Significant hypotension was not detected due to the concomitant usage of low-dose catecholamines. This concomitant usage of PDE inhibitors and catecholamines allowed easy weaning from CPB, demonstrating excellent hemodynamics after CABG. Good oxygen demand and supply balance were maintained in peripheral tissue. These results suggest that these new PDE inhibitors may be effective not only for weaning from CPB but also for post-cardiotomy cardiogenic shock. (+info)

Patient.info (February 2013). "Hypotension". Cite journal requires ,journal= (help) Kilic D, Sahin E, Gulcan O, Bolat B, Turkoz ... Similarly, octreotide can be used to treat refractory chronic hypotension. While successful treatment has been demonstrated in ...

https://en.wikipedia.org/wiki/Octreotide

"Postural hypotension". Tahami Monfared et al. 2019, p. 300. Tahami Monfared et al. 2019, p. 299. Mueller et al. 2017, pp. 393- ... Between 50 and 60% of individuals with DLB have orthostatic hypotension due to reduced blood flow, which can result in ... The severity of orthostatic hypotension also predicts a worse prognosis. Compared to AD, which is better studied, memory is ... Decreasing the dosage of dopaminergic or atypical antipsychotic drugs may be needed with orthostatic hypotension, and high ...

https://en.wikipedia.org/wiki/Dementia_with_Lewy_bodies

maintenance: title: To check the diastolic blood pressure of the patient;; mlmname: Hypotension;; arden: version 2.7;; version ... hypotension)" at stdout_dest; ;; resources: default: de ;; language: en 'msg' : "The normal range from 60 to 90"; ;; language: ... en.wikipedia.org/wiki/Hypotension;; knowledge: type: data_driven;; data: /* read the diastolic blood pressure */ diastolic_ ...

https://en.wikipedia.org/wiki/Arden_syntax

Here, however, increased CO cannot solve the structural problems causing renal artery hypotension, with the result that CO ... Larsen R, Kleinschmidt S (April 1995). "[Controlled hypotension]". Der Anaesthesist (in German). 44 (4): 291-308. doi:10.1007/ ...

https://en.wikipedia.org/wiki/Secondary_hypertension

However, significant hypotension may occur, if a patient sits up too quickly from the supine position or becomes oversedated, ... Severe hypotension. Nitrous oxide causes a decrease in blood pressure due to a reduction in sympathetic function. ...

https://en.wikipedia.org/wiki/Inhalation_sedation

Compression garment Hemostasis Hypovolemia Permissive hypotension Shock (circulatory) Mattox, Kenneth L. (January 2003). " ... "Permissive Hypotension". 8:1. trauma.org. Cite journal requires ,journal= (help) Bledsoe, Bryan (November 30, 2003). "EMS Myth ...

https://en.wikipedia.org/wiki/Military_anti-shock_trousers

Postprandial hypotension is a drastic decline in blood pressure which happens after eating a meal. Postprandial regurgitation ... "Postprandial Hypotension." Last revised February 2003. Last accessed July 13, 2007.. ...

https://en.wikipedia.org/wiki/Prandial

Symptoms have been edema of the face and tongue, or larynx; shortness of breath; wheezing; chest pain; hypotension (including ...

https://en.wikipedia.org/wiki/Oprelvekin

Rook AF, Dawson DJ (1938). "Hypotension and flying". Lancet. 232 (2): 1503-10. doi:10.1016/s0140-6736(00)83970-7. Wood, EH (Jul ...

https://en.wikipedia.org/wiki/G-suit

These include ischemia (insufficient blood flow); cerebral hypoxia (insufficient oxygen in the brain); hypotension (low blood ...

https://en.wikipedia.org/wiki/Primary_and_secondary_brain_injury

Patients who need alpha blockers for BPH, but have a history of hypotension or postural heart failure, should use these drugs ... Ultimately, this gives rise to orthostatic hypotension, dizziness, and a sudden loss of consciousness due to the drastic drop ... Again, these interactions can cause dangerous hypotension. Furthermore, in rare cases, drug interactions can cause irregular, ... orthostatic hypotension, or heart palpitations via alterations of the QT interval. Alpha blockers that may have these side ...

https://en.wikipedia.org/wiki/Alpha_blocker

Low blood pressure is hypotension. Blood pressures are also taken at other portions of the extremities. These pressures are ...

https://en.wikipedia.org/wiki/Vital_signs

MEWS score Hypotension Marshall, Jayne; Raynor, Maureen (2010). Advancing Skills in Midwifery Practice. Churchill Livingstone. ... sign takes its name from physicians working at Portsmouth University who first described the sign in the context of hypotension ...

https://en.wikipedia.org/wiki/Portsmouth_sign

Siler JN, Mager JG Jr, Wyche MQ Jr (May 1985). "Atracurium: hypotension, tachycardia and bronchospasm". Anesthesiology. 62 (5 ... hypotension and a consequent reflex tachycardia.[citation needed] These sequelae are very transient effects: The total duration ... amino alkaloid reported to be a modest CNS stimulant with epileptogenic activity and cardiovascular effects such a hypotension ...

https://en.wikipedia.org/wiki/Atracurium_besilate

These included: fainting episodes (syncope); dizziness upon arising (orthostatic hypotension); and headaches (possibly ...

https://en.wikipedia.org/wiki/Idiopathic_hypersomnia

Isoxsuprine Mittag TW, Tormay A, Messenger M, Podos SM (February 1985). "Ocular hypotension in the rabbit. Receptor mechanisms ...

https://en.wikipedia.org/wiki/Buphenine

Cardiovascular: Hypotension, which may be severe. Severe or fatal arrhythmias and heart failure are quite frequent. Kidney: 25 ...

https://en.wikipedia.org/wiki/Pentamidine

Hyperventilation-induced hypotension during cardiopulmonary resuscitation. Circulation 2004: 109:1960-1965. Lee HM, Cho KH, ...

https://en.wikipedia.org/wiki/Bag_valve_mask

Parenteral use may cause orthostatic hypotension. Eyes : Biperiden causes mydriasis with or without photophobia. It may ...

https://en.wikipedia.org/wiki/Biperiden

Hypotension (4 to 5%), poor appetite (2.5%), nausea (1%) Adverse effects associated with the clinical use of the drug are as ... Hypotension (4%) with symptoms such as dizziness and nausea (1%) have been reported. In general, these symptoms disappear ... Life-threatening hypotension may also occur. Therefore, sildenafil should not be given to patients already receiving isosorbide ... Marked symptomatic orthostatic hypotension has been reported when calcium antagonists and organic nitrates were used in ...

https://en.wikipedia.org/wiki/Isosorbide_mononitrate

If intravenous midazolam is given too quickly, hypotension may occur. A "midazolam infusion syndrome" may result from high ... Sedation, respiratory depression and hypotension due to a reduction in systematic vascular resistance, and an increase in heart ... West JM, Estrada S, Heerdt M (July 1987). "Sudden hypotension associated with midazolam and sufentanil". Anesthesia and ... Contraindications include hypersensitivity, acute narrow-angle glaucoma, shock, hypotension, or head injury. Most are relative ...

https://en.wikipedia.org/wiki/Midazolam

Orthostatic hypotension occurs when there is a persistent reduction in blood pressure of at least 20mmHg systolic or 10mmHg ... Neurogenic orthostatic hypotension showed a prevalence of 18% in patients older than 65 years and resulted in syncope in 9.4% ... As described above, orthostatic hypotension diagnosis is when there is a drop of greater than or equal to 20 mmHg or greater or ... Orthostatic hypotension is one of the most frequently identified causes of syncope in the general population. Effective ...

https://en.wikipedia.org/wiki/Orthostatic_syncope

Orthostatic Hypotension". Journal of the American Society of Hypertension. 6 (1): 40-47. doi:10.1016/j.jash.2011.10.003. ISSN ... "Agonistic Autoantibodies as Vasodilators in Orthostatic Hypotension". Hypertension. 59 (2): 402-408. doi:10.1161/ ...

https://en.wikipedia.org/wiki/Adrenergic_receptor_autoantibodies

Consequences include hypotension and worsening of anaphylaxis. Antihistamine and mast cell stabilizers e.g. cromoglicate or ... Cardiac signs on exam also include cold extremities, bradycardia, tachycardia, hypotension, possible cardiorespiratory arrest, ...

https://en.wikipedia.org/wiki/Kounis_syndrome

Postural hypotension: A report of three cases. American Heart Journal, St. Louis, 1925, 1: 73-86. Garland, Emily M.; Hooper, ... caused by orthostatic hypotension), visual disturbances and neck pain. Chest pain, fatigue and sexual dysfunction are less ...

https://en.wikipedia.org/wiki/Pure_autonomic_failure

A spinal leak may cause spontaneous intracranial hypotension (low CSF pressure) because the body cannot replenish the CSF fast ... "Headache Secondary to Intracranial Hypotension, Schievink, W and Deline, C". www.researchgate.net. Retrieved 2018-09-22. Mokri ... Kranz, Peter G.; Gray, Linda; Malinzak, Michael D.; Amrhein, Timothy J. (2019-11-01). "Spontaneous Intracranial Hypotension: ... "Prevalence of hyperdense paraspinal vein sign in patients with spontaneous intracranial hypotension without dural CSF leak on ...

https://en.wikipedia.org/wiki/Cerebrospinal_fluid_leak

Intradialytic hypotension (IDH) or hemodialysis-induced hypotension. Freezing of gait in Parkinson's disease (off-label) ... Mathias CJ (March 2008). "L-Dihydroxyphenylserine (Droxidopa) in the treatment of orthostatic hypotension: the European ... Robertson D (March 2008). "The pathophysiology and diagnosis of orthostatic hypotension". Clinical Autonomic Research. 18 ( ... July 2014). "Droxidopa for neurogenic orthostatic hypotension: a randomized, placebo-controlled, phase 3 trial". Neurology. 83 ...

https://en.wikipedia.org/wiki/Droxidopa

They can also cause tachycardia and hypotension. American College of Cardiology American Heart Association Heart Rhythm Society ...

https://en.wikipedia.org/wiki/Outline_of_cardiology

Hypotension may be treated with levarterenol or metaraminol. The oral LD50 (lethal dose in 50% of the population) of diazepam ... sedation and hypotension. Drug tolerance may also develop to infusions of diazepam if it is given for longer than 24 hours. ... Drowsiness Mental confusion Hypotension Impaired motor functions Impaired reflexes Impaired coordination Impaired balance ...

https://en.wikipedia.org/wiki/Diazepam

Less frequently, hypotension and angioedema may also occur. Symptoms may be treated or prevented with antihistamines, including ...

https://en.wikipedia.org/wiki/Vancomycin

... hypotension)? Explore low blood pressure causes, symptoms, and signs. Discover what is considered low blood pressure. ... home/high blood pressure center/ high blood pressure a-z list/slideshows a-z list , low blood pressure hypotension pictures ... Low Blood Pressure (Hypotension): Symptoms, Signs, Causes. *Reviewed By: Robert J. Bryg, MD ...

https://www.medicinenet.com/low_blood_pressure_hypotension_pictures_slideshow/article.htm?ecd=mnl_spc_021920

Orthostatic hypotension, also called postural hypotension, is a common form of low blood pressure. It occurs after a change in ... The treatment for hypotension depends on its cause. Chronic hypotension rarely exists as more than a symptom. Asymptomatic ... Chronic use of alpha blockers or beta blockers can lead to hypotension. Beta blockers can cause hypotension both by slowing the ... "Low blood pressure (hypotension)". BUPA.co.uk.. *^ Rodriguez, D; Silva, V; Prestes, J; Rica, RL; Serra, AJ; Bocalini, DS; ...

https://en.m.wikipedia.org/wiki/Low_blood_pressure

Tilt table test. If you have low blood pressure on standing, or from faulty brain signals (neurally mediated hypotension), a ... Medications. Several medications can be used to treat low blood pressure that occurs when you stand up (orthostatic hypotension ... to raise standing blood pressure levels in people with chronic orthostatic hypotension. It works by restricting the ability of ... both of which are important in treating hypotension. ... Hypotension. National Heart, Lung, and Blood Institute. https ...

https://www.mayoclinic.org/diseases-conditions/low-blood-pressure/diagnosis-treatment/drc-20355470?footprints=mine

... provides an overview of the Hypotension (Cardiovascular) pipeline landscape. Low blood pressure, or hypotension, oc ... The Hypotension (Cardiovascular) pipeline guide also reviews of key players involved in therapeutic development for Hypotension ... Hypotension - Pipeline Review, H1 2017, provides an overview of the Hypotension (Cardiovascular) pipeline landscape. ... Orbis Research : Hypotension - Pipeline Review, Technologies & Forecasts Report H1 2017. March 15th, 2017 Orbis Research ...

https://www.medgadget.com/2017/03/orbis-research-hypotension-pipeline-review-technologies-forecasts-report-h1-2017.html

Hypotension or low blood pressure can be defined as blood pressure less than 90/60 mmHg in adults. It can affect your health, ... What are the risks of low blood pressure or hypotension? The risks of hypotension or low blood pressure are many. let us find ... Hypotension or low blood pressure can be defined as blood pressure less than 90/60 mmHg in adults. ... Hypotension is not considered a problem unless it causes the following symptoms.. ...

http://www.onlymyhealth.com/the-basics-low-blood-pressure-1298541403

... . . In this systematic review, no evidence was found to ... normal saline for the treatment of symptomatic hypotension in maintenance haemodialysis patients with intradialytic hypotension ...

http://www.nephrologynow.com/publications/human-albumin-for-intradialytic-hypotension-in-haemodialysis-patients

Jaffe, R. S., Ankunding, J., & Goodnight Jr, J. E. (1994). Octreotide for treatment of intraoperative hypotension due to an ... Jaffe, RS, Ankunding, J & Goodnight Jr, JE 1994, Octreotide for treatment of intraoperative hypotension due to an unexpected ... Octreotide for treatment of intraoperative hypotension due to an unexpected neuroblastoma in an adult. Anesthesiology. 1994;81( ... Octreotide for treatment of intraoperative hypotension due to an unexpected neuroblastoma in an adult. In: Anesthesiology. 1994 ...

https://ucdavis.pure.elsevier.com/en/publications/octreotide-for-treatment-of-intraoperative-hypotension-due-to-an-

"Orthostatic Hypotension". Merck Manual.. *^ Idiopathic Orthostatic Hypotension and other Autonomic Failure Syndromes at ... "Orthostatic hypotension" at Dorlands Medical Dictionary *^ "Orthostatic Hypotension Information Page , National Institute of ... Orthostatic hypotension, also known as postural hypotension,[2] is a medical condition wherein a persons blood pressure falls ... Orthostatic hypotension (or postural hypotension) is a drop in blood pressure upon standing. One definition (AAFP) calls for a ...

https://en.wikipedia.org/wiki/Postural_hypotension

Postural hypotension. BMJ 2011; 342 doi: https://doi.org/10.1136/bmj.d3128 (Published 16 June 2011) Cite this as: BMJ 2011;342: ...

https://www.bmj.com/content/342/bmj.d3128/submit-a-rapid-response

Definition Orthostatic hypotension [2] refers to a reduction of blood pressure [3] (systolic blood pressure [4] that occurs ... Orthostatic Hypotension. Definition. Orthostatic hypotension is an abnormal decrease in blood pressure when a person stands up ... Orthostatic hypotension. Definition. Orthostatic hypotension refers to a reduction of blood pressure (systolic blood pressure ... "Orthostatic Hypotension." Clinics in Geriatric Medicine 18:2: (May 2002).. Viramo, Petteri. "Orthostatic Hypotension and ...

https://www.encyclopedia.com/medicine/diseases-and-conditions/pathology/orthostatic-hypotension

Orthostatic hypotension is a drop in blood pressure that occurs when moving from a laying down (supine) position to a standing ... Orthostatic hypotension has two forms that result from two main causes.. The neurogenic form is caused by problems with the ... Orthostatic hypotension is a drop in blood pressure that occurs when moving from a laying down (supine) position to a standing ... Orthostatic Hypotension: JACC State-of-the-Art Review. J Am Coll Cardiol. 2018 Sep 11;72(11):1294-1309. doi: 10.1016/j.jacc. ...

https://medlineplus.gov/genetics/condition/orthostatic-hypotension/

hypotension as such.However Scots Broom has a well known effect of raising blood pressure because of a mild peripheral vaso- ... Alternative YouCardiovascular SystemConditionsEndocrineGeneralHeart HealthHerbHerbal MedicineHigh Blood PressureHypotension ...

https://healthy.net/2000/12/06/hypotension/

Hypotension in Meprobamate Intoxication. Br Med J 1960; 2 doi: https://doi.org/10.1136/bmj.2.5195.387-b (Published 30 July 1960 ...

http://www.bmj.com/content/2/5195/387.3

Find out about the drop in blood pressure that causes orthostatic hypotension, including how and why it occurs. Learn the ... Orthostatic hypotension, also called postural hypotension, is defined as a sudden drop in blood pressure caused by a change in ... Low blood pressure is a symptom of orthostatic hypotension.. Hypotension, or low blood pressure, occurs when the blood pressure ... Orthostatic hypotension is common among people who are 65 or older because the bodys ability to react to drops in blood ...

https://www.medicalnewstoday.com/articles/318158

A day after the FDA said it was ready to withdraw approval of the orthostatic hypotension drug midodrine, the drugs maker said ... A day after the FDA said it was ready to withdraw approval of the orthostatic hypotension drug midodrine, the drugs maker said ...

https://www.medpagetoday.com/productalert/prescriptions/21732

Midodrine is used fairly frequently in pts with hypotension. However, it is to be used only with pts who even when not on ... Just a reminder that even if they are asymptomatic, hypotension can cause other issues such as poor perfusion of organs and, if ...

http://allnurses.com/dialysis-renal-urology/hypotension-776833.html

What is orthostatic hypotension? It is a type of low blood pressure in which a person becomes dizzy, lightheaded, or faints ... home/heart health center/heart a-z list/orthostatic hypotension center /orthostatic hypotension article ... Orthostatic Hypotension - Treatment What kinds of treatment, therapy, or medication did you receive for orthostatic hypotension ... Orthostatic Hypotension (Low Blood Pressure When Standing). *Orthostatic hypotension definition and facts ...

https://www.medicinenet.com/orthostatic_hypotension/article.htm

Ask questions and get answers about Hypotension. Our support group helps people share their own experience. 25 questions, 29 ... Join the Hypotension group to help and get support from people like you. ... Our support group for Hypotension has 25 questions and 29 members. Updated 25 Apr 2019. ...

https://www.drugs.com/answers/support-group/hypotension/

Create healthcare diagrams like this example called Orthostatic Hypotension - 1 in minutes with SmartDraw. SmartDraw includes ... Orthostatic Hypotension - 1. Create healthcare diagrams like this example called Orthostatic Hypotension - 1 in minutes with ... Orthostatic Hypotension. Health care professional measuring blood pressure of male patient in standing position, using wall ...

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now i am not saying i have POTS or hypotension or synascope or or or all the rest of these postural or what ever things. but it ... Yes....the Orthostatic Hypotension...breathless...skipped beats....ready to drop. So there is a name for this condition? PCS? I ... funny enough the exact words i had used over the two years like ear distortion and skipped beats are symtoms of hypotension ... i have read many articles stating that extreeme varicose veins cause hypotension (low blood pressure).-- and inturn our hearts ...

https://www.dailystrength.org/group/pelvic-congestion-syndrome/discussion/hypotension-amp-varicosities

hypotension synonyms, hypotension pronunciation, hypotension translation, English dictionary definition of hypotension. n. 1. ... Related to hypotension: orthostatic hypotension. hy·po·ten·sion. (hī′pə-tĕn′shən). n.. 1. Abnormally low arterial blood ... orthostatic hypotension, postural hypotension - low blood pressure occurring in some people when they stand up ... Hypotension - definition of hypotension by The Free Dictionary https://www.thefreedictionary.com/hypotension ...

http://www.thefreedictionary.com/hypotension

Controlled hypotension definition at Dictionary.com, a free online dictionary with pronunciation, synonyms and translation. ...

http://www.dictionary.com/browse/controlled-hypotension

Forms of hypotension. Orthostatic hypotension, also called "postural hypotension," is a common form of low blood pressure. It ... Low blood pressure (Hypotension) MedicineNet.com. Retrieved September 19, 2008.. *Turkington, C. A. 2004. Hypotension. Pages ... The treatment for hypotension depends on its cause. Asymptomatic hypotension in healthy people usually does not require ... Arrhythmias often result in hypotension by this mechanism. Beta blockers can cause hypotension both by slowing the heart rate ...

http://www.newworldencyclopedia.org/entry/Hypotension

Re: Hypotension and exercise?. Hi USMiss,. I have orthostatic hypotension also. I found that I had to modify the intense ... Re: Hypotension and exercise?. [QUOTE=DrJuliaco;5123055]Don t be afraid to be active. Regular physical activity is the first ... Hypotension and exercise?. I have low blood pressure that typically runs anywhere from 90-110 over 50-65. I also have ... Re: Hypotension and exercise?. [QUOTE=USmiss;5120489]I have low blood pressure that typically runs anywhere from 90-110 over 50 ...

https://www.healthboards.com/boards/high-low-blood-pressure/936101-hypotension-exercise-print.html

UroToday - GU OncToday brings coverage of the clinically relevant content needed to stay at the forefront of the dynamic field of GU oncology and urology.

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... , Postural Hypotension, Orthostatic Blood Pressure, Orthostasis, Orthostatic Syncope, Postural Blood ... Hypotension, Postural, HYPOTENSION ORTHOSTATIC, HYPOTENSION POSTURAL, Orthostatic hypo-tension, Hypotension, Orthostatic, ... hypotension, postural; hypotension, Hypotension, orthostatic, postural hypotension. French. HYPOTENSION ORTHOSTATIQUE, ... HYPOTENSION, ORTHOSTATIC, Postural Hypotension, Hypotension, postural, Hypotension, Orthostatic [Disease/Finding], hypotension ...

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Salt intake and hypotension. A low salt diet intake can be the main factor that produces hypotension. Sodium is necessary for ... DIET FOR HYPOTENSION. Nutrition plays a fundamental role in controlling hypotension by helping to prevent the causes and ... Vitamin deficiency and hypotension. Lack of vitamins, especially vitamin C, Vitamin B and vitamin E shortness can be ... Water intake and hypotension. Drinking much water increases blood volume which raises blood pressure. Although your body will ...

https://www.botanical-online.com/hypotensiondiet.htm

Find the best doctors for treating Hypotension in Marion. Compare doctors, read patient reviews and more. Book an appointment ... There are 57 doctors for Hypotension in Marion. Find the best for you:. *. ...

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Find the best doctors for treating Hypotension in Falmouth. Compare doctors, read patient reviews and more. Book an appointment ... There are 45 doctors for Hypotension in Falmouth. Find the best for you:. *. ...

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... a phenomenon termed orthostatic hypotension. Orthostatic hypotension can cause dizziness, syncope, and ... a phenomenon termed orthostatic hypotension. Orthostatic hypotension can cause dizziness, syncope, and even angina or stroke. ... Postural hypotension. BMJ 2011; 342:d3128.. *Huang CC, Sandroni P, Sletten DM, et al. Effect of age on adrenergic and vagal ... Orthostatic hypotension, diabetes, and falling in older patients: a cross-sectional study. Br J Gen Pract 2012; 62:e696. ...

https://www.uptodate.com/contents/mechanisms-causes-and-evaluation-of-orthostatic-hypotension

The Syncope Roadmaps will begin from the same starting point. There will be four destinations (probable causes) which will be known by you at the beginning of the journey.. The routes have been arbitrarily determined by the expert who begins by quickly providing background information from the past history, social history, and family history. The terrain through which you then travel is also arbitrary. It includes: timing, setting, event onset, event recovery, and other spells.. Displayed are the four syncope roadmaps in a single composite. These four disorders comprise over 90% of all causes of syncope in clinical practice. Similarities and differences are represented graphically.. Obtaining background information from the medical record or history questionnaire, should always precede talking directly to the patient. This information is always vital.. Dr. Winston uses the same approach with each patient. He begins with ...

http://www.med.umich.edu/lrc/psb_open/html/repo/rm_syn_ortho/rm_syn_ortho_02.html

... regional cerebral blood flow was measured in a patient with the diagnosis of idiopathic orthostatic hypotension. Blood pressure ... Bradbury, S., Eggleston, C.: Postural hypotension. A report of three cases. Am. Heart J. 1, 73-86 (1926)Google Scholar ... Idiopathische orthostatische Hypotension Cerebrale Durchblutung Neurogene Kontrolle Autoregulation Idiopathic orthostatic ... A study in a patient with idiopathic orthostatic hypotension. In: Ross Russell R. W. (ed.) Brain and Blood Flow. Proceedings of ...

https://link.springer.com/article/10.1007/BF00431050

... predict hypotension," Dr. Cannesson said. "The statistical association between these features and the occurrence of hypotension ... Advance warning that hypotension is imminent, even if the warning comes only 10 to 15 minutes ahead, could reduce the risk of ... Tags: Acute Kidney Injury, Anesthesiology, Arrhythmia, Blood, Blood Pressure, Brain, Heart, Heart Attack, Hypotension, Kidney, ... The algorithm identifies hypotension 15 minutes before it occurs in 84 percent of cases, the researchers report in a new study ...

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Orthostatic Hypotension Among Veterans. *Hypotension, Orthostatic Hypotension. Observational. *James J. Peters Veterans Affairs ... 167 Studies found for: Orthostatic Hypotension. Also searched for Standing, Low blood pressure, and Postural Hypotension. See ... Breathing Device for Orthostatic Hypotension (OH). *Orthostatic Hypotension. *Device: Inspiratory Threshold Device (Res-Q-Gard ... Study to Assess the Benefit of Midodrine in the Treatment of Patients With Neurogenic Orthostatic Hypotension. *Hypotension, ...

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Postprandial hypotension is a drop in blood pressure after food consumption and is actually fairly common, affecting approximately one-third of older men and women. (facty.com)
The most common symptoms of postprandial hypotension include lightheadedness, dizziness, and syncope (fainting as a result of low blood pressure), People with postprandial hypotension may also experience angina (chest pain), nausea, and visual disturbances. (facty.com)
Postprandial hypotension is a frequent disorder, occurring in approximately 40% of nursing-home residents, and represents a major cause of morbidity and mortality. (edu.au)
Strategies for the treatment of postprandial hypotension should, therefore, potentially be directed at (i) meal composition, particularly carbohydrate type and content, (ii) slowing gastric emptying and/or small intestinal carbohydrate absorption and/or (iii) increasing postprandial gastric distension. (edu.au)
The people with the severe autonomic nervous system and Parkinson's diseases are likely to have postprandial Hypotension. (thehealthfulness.com)

The primary symptoms of hypotension are lightheadedness or dizziness . (wikipedia.org)
Symptoms, such as light-headedness while standing up from lying down and dizziness, may be due to a condition called postural hypotension. (reference.com)
Problems that people suffering from hypotension may feel are dizziness, lack of concentration, nausea, increased thirst, blurred vision, shallow breathing and fatigue. (steadyhealth.com)
Low blood pressure, also called hypotension, is usually defined as having a blood pressure low enough to cause dizziness, blurry vision or fainting. (washingtontimesreporter.com)

If you have low blood pressure on standing, or from faulty brain signals (neurally mediated hypotension), a tilt table test can evaluate how your body reacts to changes in position. (mayoclinic.org)

Another type of hypotension is when blood pressure drops very suddenly. (stayhealthy.fit)
The three variants of this type of hypotension are orthostatic, neutrally mediated, and a very severe form of hypotension called hypotension from shock. (stayhealthy.fit)

Arrhythmias often result in hypotension by this mechanism. (wikipedia.org)

In patients with an activated renin-angiotensin system, such as volume- or salt-depleted patients (e.g., those being treated with high doses of diuretics), symptomatic hypotension may occur after initiation of therapy with CRESAR AM tablets. (ciplamed.com)

Background: Intraoperative hypotension is associated with a risk of postoperative organ dysfunction. (elsevier.com)

This is called postural or orthostatic hypotension and is caused by not enough blood getting to the brain. (dietdoctor.com)

Low blood pressure, or hypotension, occurs when blood pressure during and after each heartbeat is much lower than usual. (medgadget.com)
If hypotension occurs, vasopressors that act directly on adrenergic receptors could be more effective. (biomedcentral.com)
Even though hypotension occurs regardless of age or sex, it is a fact that with age, people become more prone to this condition. (steadyhealth.com)

If the reason for your hypotension is to be found on the side of dehydration or heat stroke, the most effective remedy is therefore to drink water. (mesplantes.net)

Magnetic resonance imaging (MRI) can be employed to assess possible etiologies of neurogenic orthostatic hypotension. (news-medical.net)

This is a very interesting option to avoid suffering from regular episodes of hypotension. (mesplantes.net)

Hypotension is the opposite of hypertension , which is high blood pressure. (wikipedia.org)

Treatment of hypotension may include the use of intravenous fluids or vasopressors . (wikipedia.org)
Asymptomatic chronic hypotension is not considered a disease, therefore treatment is not required. (news-medical.net)

Excessive vasodilation , or insufficient constriction of the resistance blood vessels (mostly arterioles ), causes hypotension. (wikipedia.org)

Different forms of hypotension can be clinically classified into three groups based on their symptoms: asymptomatic chronic hypotension, chronic hypotension with multiple symptoms and orthostatic dysregulation. (news-medical.net)
Some people have chronic hypotension, also called chronic asymptomatic hypotension. (stayhealthy.fit)

Other medications can produce hypotension by different mechanisms. (wikipedia.org)

In orthostatic hypotension, or orthostatic dysregulation, changes in the position (especially standing up) can decrease venous blood return to the heart, resulting in a sudden drop in blood pressure. (news-medical.net)

Since the vasodilation induced by amlodipine is gradual in onset, acute hypotension has rarely been reported after oral administration. (ciplamed.com)

For example, hypotension associated with shock can occur from rapid blood loss, certain serious infections, severe allergic reactions or burns, and poison. (stayhealthy.fit)
If hypotension does occur, place the patient in the supine position and, if necessary, give an intravenous infusion of normal saline. (ciplamed.com)

Vigilance for unexpected hypotension is important in surgical patients who are treated with selective α 1 -AR blockers. (biomedcentral.com)

At this point, the differential diagnosis of hypotension was primarily directed to deep anesthesia or hypovolemia. (biomedcentral.com)
The diagnosis of hypotension is based on the medical history, a physical exam and test results. (news-medical.net)
The measurement of blood pressure and heart rate while supine for at least 5 minutes and then again after standing for 1 and 3 minutes is important in establishing a diagnosis of orthostatic hypotension. (news-medical.net)

Besides this, according to the results of numerous studies that have been conducted, it has been concluded that, when it comes to elderly people, there is a connection between low blood pressure and conditions such as angina and myocardial infraction, as well as there has been found a connection between hypotension and people with low BMI, or those who use hypotensive drugs. (steadyhealth.com)

Decreased cardiac output despite normal blood volume, due to severe congestive heart failure , large myocardial infarction , heart valve problems, or extremely low heart rate ( bradycardia ), often produces hypotension and can rapidly progress to cardiogenic shock . (wikipedia.org)

Orthostatic Hypotension (Postural Hypotension): It is a condition in which the blood pressure drops when you stand up on a quick mode. (thehealthfulness.com)

Global Markets Direct's Pharmaceutical and Healthcare latest pipeline guide Hypotension - Pipeline Review, H1 2017, provides comprehensive information on the therapeutics under development for Hypotension (Cardiovascular), complete with analysis by stage of development, drug target, mechanism of action (MoA), route of administration (RoA) and molecule type. (medgadget.com)
The pipeline guide evaluates Hypotension (Cardiovascular) therapeutics based on mechanism of action (MoA), drug target, route of administration (RoA) and molecule type. (medgadget.com)
This dual mechanism gets impaired in orthostatic Hypotension, resulting in low blood pressure. (thehealthfulness.com)

Hypotension is low blood pressure , especially in the arteries of the left sided systemic circulation . (wikipedia.org)

hypotension can make us feel dizzy and other unpleasant symptoms, it is necessary that we consume foods that help us to keep our blood pressure stable. (mesplantes.net)

Hypotension - Pipeline Review, H1 2017, provides an overview of the Hypotension (Cardiovascular) pipeline landscape. (medgadget.com)
The Hypotension (Cardiovascular) pipeline guide also reviews of key players involved in therapeutic development for Hypotension and features dormant and discontinued projects. (medgadget.com)
Hypotension (Cardiovascular) pipeline guide helps in identifying and tracking emerging players in the market and their portfolios, enhances decision making capabilities and helps to create effective counter strategies to gain competitive advantage. (medgadget.com)
The pipeline guide provides a snapshot of the global therapeutic landscape of Hypotension (Cardiovascular). (medgadget.com)
The pipeline guide reviews pipeline therapeutics for Hypotension (Cardiovascular) by companies and universities/research institutes based on information derived from company and industry-specific sources. (medgadget.com)
The pipeline guide reviews key companies involved in Hypotension (Cardiovascular) therapeutics and enlists all their major and minor projects. (medgadget.com)
Find and recognize significant and varied types of therapeutics under development for Hypotension (Cardiovascular). (medgadget.com)
Formulate corrective measures for pipeline projects by understanding Hypotension (Cardiovascular) pipeline depth and focus of Indication therapeutics. (medgadget.com)
The aim of the current study was to investigate autonomic and cardiovascular activity during sleep in individuals with essential hypotension. (unipd.it)

Anatomy5

Organisms3

Diseases24

Chemicals and Drugs25

Analytical, Diagnostic and Therapeutic Techniques and Equipment27

Psychiatry and Psychology1

Phenomena and Processes22

Disciplines and Occupations1

Health Care2

Nitric oxide limits the eicosanoid-dependent bronchoconstriction and hypotension induced by endothelin-1 in the guinea-pig. (1/1770)

The Janus-faced aspect of 'dry weight'. (2/1770)

Hypotension induced by exercise is associated with enhanced release of adenyl purines from aged rat artery. (3/1770)

Mediation of humoral catecholamine secretion by the renin-angiotensin system in hypotensive rainbow trout (Oncorhynchus mykiss). (4/1770)

Sudden death in hypertrophic cardiomyopathy: potential importance of altered autonomic control of vasculature. (5/1770)

Effects of isoflurane anesthesia on pulmonary vascular response to K+ ATP channel activation and circulatory hypotension in chronically instrumented dogs. (6/1770)

Spike generation from dorsal roots and cutaneous afferents by hypoxia or hypercapnia in the rat in vivo. (7/1770)

Effects of phosphodiesterase inhibitors after coronary artery bypass grafting. (8/1770)

Hypotension

Hypotension, Controlled

Hypotension, Orthostatic

Intracranial Hypotension

Blood Pressure

Post-Exercise Hypotension

Trimethaphan

Bradycardia

Heart Rate

Ephedrine

Anesthesia, Spinal

Anesthesia, Obstetrical

Hemodynamics

Autonomic Nervous System Diseases

Shock

Anesthesia

Shock, Septic

Midodrine

Cerebrovascular Circulation

Vascular Resistance

Nitroprusside

Ocular Hypotension

Cardiac Output

Hypovolemia

Ferricyanides

Syncope

Shy-Drager Syndrome

Pure Autonomic Failure

Blood Patch, Epidural

Posture

Intraoperative Complications

Subdural Effusion

Tilt-Table Test

Intracranial Pressure

Vasoconstrictor Agents

Shock, Hemorrhagic

Cardiovascular System

Fluid Therapy

Hemorrhage

Sympathetic Nervous System

Dogs

Blood Volume

Cesarean Section

Methyldopa

Anesthesia, Epidural

Autonomic Nervous System

Bionics

Isotonic Solutions

Pressoreceptors

Phenylephrine

Norepinephrine

Regional Blood Flow

Time Factors

Baroreflex

Antihypertensive Agents

Splanchnic Circulation

Clonidine

Vasodilation

Lypressin

Dose-Response Relationship, Drug

Plasma Substitutes

Syncope, Vasovagal

Infusions, Intravenous

Rats, Sprague-Dawley

Fludrocortisone

Valsalva Maneuver

Renal Dialysis

Hydralazine

Isoflurane

Injections, Intravenous

Bupivacaine

Reflex

Supine Position

Prospective Studies

Anesthesia, General

Hypertension

Vasodilator Agents

Heat Stroke

Anaphylaxis

Tachycardia