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Force from blood vessels that affects blood flow
Vascular resistance is the resistance that must be overcome for blood to flow through the circulatory system. The resistance offered by the systemic circulation
Vascular_resistance
Medical diagnostic method
The RI is altered not by vascular resistance alone but by the combination of vascular resistance and vascular compliance. Normal mean renal artery
Arterial_resistivity_index
Widening of blood vessels
increased due to a decrease in vascular resistance and increase in cardiac output[further explanation needed]. Vascular resistance is the amount of force circulating
Vasodilation
Dynamics of blood flow
blood to clot. To determine the systemic vascular resistance (SVR) the formula for calculating all resistance is used. R = ( Δ p r e s s u r e ) / f l
Hemodynamics
Narrowing of blood vessels due to the constriction of smooth muscle cells
restricted or decreased, thus retaining body heat or increasing vascular resistance. This makes the skin turn paler because less blood reaches the surface
Vasoconstriction
Small arteries in the microcirculation
to two layers of smooth muscle cells) and are the primary site of vascular resistance. The greatest change in blood pressure and velocity of blood flow
Arteriole
Increased blood pressure in lung arteries
rest, revised down from a purely arbitrary 25mmHg, and pulmonary vascular resistance (PVR) greater than 3 Wood units. The cause is often unknown. Risk
Pulmonary_hypertension
High blood pressure in the pulmonary arteries
pre-capillary pulmonary hypertension is confirmed with measuring pulmonary vascular resistance being greater than 3 Woods Units. A pulmonary artery wedge pressure
Pulmonary arterial hypertension
Pulmonary_arterial_hypertension
Tubular structure carrying blood
and rarely exceed 10 mmHg. Vascular resistance occurs when the vessels away from the heart oppose the flow of blood. Resistance is an accumulation of three
Blood_vessel
Medical intervention
pressure is equivalent to voltage, flow to current, vascular resistance to electrical resistance and myocardial work to power. The relationship between
Impedance_cardiography
Type of neurocognitive impairment
(VPS) is a postperfusion syndrome characterized by low systemic vascular resistance and a high cardiac output. VPS occurs more frequently after on pump
Vasoplegic_syndrome
Pressure exerted by circulating blood upon the walls of arteries
differences. Blood pressure is influenced by cardiac output, systemic vascular resistance, blood volume, and arterial stiffness. It varies depending on a person's
Blood_pressure
Circulatory system of fetuses
Together, these forces will decrease the pulmonary vascular resistance. With decreased resistance in the lungs, there will be increased blood flow to
Fetal_circulation
Part of the vertebrate circulatory system
two mechanisms accommodate the additional blood flow by reducing vascular resistance and can normally accommodate all the additional required blood flow
Pulmonary_circulation
Medication against high blood pressure
a result of its acting directly on vascular smooth muscle, causing a reduction in peripheral vascular resistance and a consequent reduction in blood
Amlodipine
Average blood pressure in an individual during a single cardiac cycle
is about 90 mmHg. MAP is altered by cardiac output and systemic vascular resistance. It is used to estimate the risk of cardiovascular diseases, where
Mean_arterial_pressure
Very high blood pressure and signs of organ damage
Failure of normal autoregulation and an abrupt rise in systemic vascular resistance are typical initial components of the disease process. Hypertensive
Hypertensive_emergency
Abnormally increased circulatory volume
Systemic vasodilation and the associated decrease in peripheral vascular resistance results in decreased pulmonary capillary wedge pressure and decreased
Hyperdynamic_circulation
Topics referred to by the same term
Vascular resistance Electrical resistance, the measure of the degree to which a conductor opposes the flow of an electric current through that conductor
Flow_resistance
Heart defect
aortopulmonary window vary based on the size of the defect and the pulmonary vascular resistance. Cardiac examination typically indicates a parasternal lift resulting
Aortopulmonary_window
Hormone secreted in the heart
BNP are similar to those of ANP and include decrease in systemic vascular resistance and central venous pressure as well as an increase in natriuresis
Brain_natriuretic_peptide_32
Substance that raises blood pressure
pressure by constricting blood vessels, thereby increasing systemic vascular resistance. This is different from inotropes which increase the force of cardiac
Antihypotensive
Medication used to treat high blood pressure
peripheral vascular resistance decreases when labetalol is first administered. Continuous labetalol use further decreases peripheral vascular resistance. However
Labetalol
Type of congenital heart defect
of the outflow tract myocardium. A relative decrease in systemic vascular resistance, as may be observed in distributive or neurogenic shock, may also
Tetralogy_of_Fallot
Sensors detecting blood pressure
reflexes that in turn influence cardiac output and vascular smooth muscle to influence vascular resistance. Baroreceptors act immediately as part of a negative
Baroreceptor
Hormone system
regulates blood pressure / fluid / electrolyte balance, and systemic vascular resistance. When renal blood flow is reduced, juxtaglomerular cells in the kidneys
Renin–angiotensin_system
Medical condition
failure of the right ventricle of the heart as a response to increased vascular resistance (such as from pulmonic stenosis) or high blood pressure in the lungs
Pulmonary_heart_disease
Fluid accumulation in the tissue and air spaces of the lungs
cardiovascular disease. Treatment of FPE should include reducing systemic vascular resistance with nitroglycerin, providing supplemental oxygenation, and decreasing
Pulmonary_edema
Type of congenital heart defect
appearance at birth. When the ductus begins to close and pulmonary vascular resistance decreases, blood flow through the ductus is restricted and flow to
Hypoplastic left heart syndrome
Hypoplastic_left_heart_syndrome
Medical intervention
vascular resistance is too elevated to allow sufficient oxygenation. In physiologic parameters, this includes elevated pulmonary vascular resistance,
Bidirectional_Glenn_procedure
Insufficient blood flow due to autonomic nervous system damage
brain injury. Low blood pressure occurs due to decreased systemic vascular resistance resulting from loss of sympathetic tone, which in turn causes blood
Neurogenic_shock
Variable resistance mechanism used for flow control in heart surgery
providing a variable resistor. This resistance was used to simulate TPR, or total peripheral (vascular) resistance. Starling resistors have been used both
Starling_resistor
Mammalian hormone released from the pituitary gland
nephrons. Second, AVP constricts arterioles, which increases peripheral vascular resistance and raises arterial blood pressure. A third function is possible
Vasopressin
Blood pressure in vein near the heart
baroreflex responds to an increase in CVP by decreasing systemic vascular resistance while increasing heart rate and ventricular contractility in dogs
Central_venous_pressure
Air pressure inside lung alveoli
pressure to decrease. Alveolar pressure therefore influences the vascular resistance of these vessels. Alveolar pressure is typically the effective pressure
Alveolar_pressure
Science of elucidating, diagnosing, and treating the electrical activities of the heart
ventricular Aortic Other Ventricular remodeling Vascular system/ hemodynamics Blood flow Compliance Vascular resistance Pulse Perfusion Blood pressure Pulse pressure
Cardiac_electrophysiology
Haemodynamic parameter
decreased CI due to failure of pump action. An increase in systemic vascular resistance (SVR) is usually observed as the body attempts to compensate for
Cardiac_index
Diuretic medication
volume and lowers blood volume. It is believed to reduce peripheral vascular resistance. Potential side effects include poor kidney function, electrolyte
Hydrochlorothiazide
Group of blood vessels
particularly in smaller animals, provide a significant source of vascular resistance. These branches have a dense innervation by sympathetic nerves, allowing
Mesenteric_arteries
Ability of a biological organ to distend
makes the topic of haemodynamic response (including vascular compliance and vascular resistance) a matter of medical and pharmacologic complexity beyond
Compliance_(physiology)
Insertion of a catheter into a chamber or vessel of the heart
pressure Pulmonary capillary wedge pressure Systemic vascular resistance Pulmonary vascular resistance Cardiac output Blood oxygenation Coronary catheterization
Cardiac_catheterization
Class of pharmacological agents
and psychiatric depression. Hypertension is due to an increase in vascular resistance and vasoconstriction. Using α1 selective antagonists, such as prazosin
Alpha_blocker
Physiological phenomenon
altitude, where HPV causes a significant increase in total pulmonary vascular resistance, and pulmonary arterial pressure, potentially leading to pulmonary
Hypoxic pulmonary vasoconstriction
Hypoxic_pulmonary_vasoconstriction
Topics referred to by the same term
Proliferative vitreoretinopathy, an eye disease Pulmonary vascular resistance, a type of resistance that must be overcome to create blood flow Petrol vapour
PVR
Chemical compound
works to increase the heart's contractility and decrease pulmonary vascular resistance. Milrinone also works to vasodilate which helps alleviate increased
Milrinone
Insufficient blood flow due to abnormal distribution in the capillaries
anaphylactic shock low blood pressure is related to decreased systemic vascular resistance (SVR) triggered primarily by a massive release of histamine by mast
Distributive_shock
Endogenous agent or pharmaceutical drug that affects blood pressure / heart rate
vasoactivity, that is, vascular activity (effect on blood vessels). By adjusting vascular compliance and vascular resistance, typically through vasodilation
Vasoactivity
Medical condition
cardiomegaly and congestive heart failure due to long-term low systemic vascular resistance and consequent cardiac remodeling. Cantú syndrome is caused by gain-of-function
Cantú_syndrome
Medical condition
failure at birth, though these conditions may get better as pulmonary vascular resistance decreases. The main clinical features in older patients are right
Uhl_anomaly
Medical condition
Squatting leads to an increase in systemic vascular resistance. An increase in systemic vascular resistance results in an increase in afterload. With HOCM
Heart_murmur
Failure of cells to respond appropriately to insulin
"Fast food, central nervous system insulin resistance, and obesity". Arteriosclerosis, Thrombosis, and Vascular Biology. 25 (12): 2451–62. doi:10.1161/01
Insulin_resistance
Chest discomfort due to disorder of the heart muscles
also reduce systemic vascular resistance, of both veins and arteries but the veins to a greater extent. The decrease in the resistance of the arteries and
Angina
Topics referred to by the same term
svr in Wiktionary, the free dictionary. SVR may refer to: Systemic vascular resistance Sustained viral response in hepatitis C treatment Foreign Intelligence
SVR
Medical condition
venous fibrous intimal thickening result in progressive increase in vascular resistance. It is a rare cause of pulmonary hypertension, and occurs predominantly
Pulmonary capillary hemangiomatosis
Pulmonary_capillary_hemangiomatosis
Blood vessels that carry blood away from the heart
heart output (cardiac output) and systemic vascular resistance, which refers to the collective resistance of all of the body's arterioles, are the principal
Artery
Medical condition
of the great arteries, or any condition which increases pulmonary vascular resistance. The result may be the development of collateral circulation. Tetralogy
Cyanotic_heart_defect
causes a fall in peripheral vascular resistance. Because blood pressure is directly proportional to peripheral vascular resistance, in an AV fistula there
Nicoladoni–Branham_sign
Physiological reaction to a perceived threat or harmful event
from the dorsal hypothalamus, which activates the heart, increases vascular resistance, and increases blood flow, especially to the muscle, heart, and brain
Fight-or-flight_response
Intravenous medication used in anesthesia
intravenous anesthetic agents. Propofol can also decrease systemic vascular resistance, myocardial blood flow, and oxygen consumption, possibly through
Propofol
Alternate blood flow around a blockage
formation may be related by pathological conditions such as high vascular resistance or ischaemia. It is occasionally also known as accessory circulation
Collateral_circulation
minor degree than ANP) reduce blood pressure by: reducing systemic vascular resistance, reducing blood water, sodium and fats 19 Calcitonin CT Peptide thyroid
List_of_human_hormones
Drug used to treat high blood pressure
controlling heart rate, force of cardiac contraction and peripheral vascular resistance. At doses of 0.05 to 0.2 mg per day, reserpine is well tolerated;
Reserpine
Neonatal adaptations
reverting hypoxic pulmonary vasoconstriction that had held the pulmonary vascular resistance high during the uterine life. Lung ventilation also extends the so
Adaptation to extrauterine life
Adaptation_to_extrauterine_life
Air-filled spaces surrounding the nasal cavity
pulmonary arterioles, causing vasodilation and a reduction in pulmonary vascular resistance allowing for more efficient transfer of oxygen from the air into
Paranasal_sinuses
Rate of blood flow back to the heart
atrial pressure, divided by the resistance of the entire systemic circulation (i.e., the systemic vascular resistance). It is often suggested that venous
Venous_return
Resistance of microbes to drugs directed against them
can develop resistance, including bacteria (antibiotic resistance), viruses (antiviral resistance), parasites (antiparasitic resistance), and fungi (antifungal
Antimicrobial_resistance
Vein running from the placenta to the fetus
functionally obstructing nearby vessels. Vessel occlusion increases vascular resistance and therefore leads to hypertension. In portal hypertension, the
Umbilical_vein
Topics referred to by the same term
Tetratricopeptide repeat, a degenerate protein sequence Total peripheral resistance, vascular resistance Translocated promoter region, part of a protein True positive
TPR
Medical condition
for the heart to pump blood. In a fetus, there is high pulmonary vascular resistance (PVR) and low pulmonary blood flow as the fetus does not use the
Persistent_fetal_circulation
Medical condition
Hyperdynamic circulation, with peripheral vasodilatation from low systemic vascular resistance, leads to hypotension. There is a compensatory increase in cardiac
Acute_liver_failure
Surgical procedure used in children with univentricular hearts
high pulmonary vascular resistance may not tolerate a Fontan procedure. Often, cardiac catheterization is performed to check the resistance before proceeding
Fontan_procedure
vein isolation PVOD Pulmonary venoocclusive disease PVR pulmonary vascular resistance Postvoid residual urine volume PVS perivascular space persistent
List of medical abbreviations: P
List_of_medical_abbreviations:_P
System of veins comprising the hepatic portal vein and its tributaries
of the liver. Liver cirrhosis can lead to increased intrahepatic vascular resistance and vasodilation of portal system arteries, both of which increase
Hepatic_portal_system
Medical diagnostic method
hemodynamic parameters such as cardiac output, stroke volume, systemic vascular resistance, thoracic fluid index, ICON (index of contractility), and systolic
Electrical_cardiometry
Spontaneous oscillation in tone of blood vessel walls
Reassessing the Mathematical Modeling of the Contribution of Vasomotion to Vascular Resistance. J Appl Physiol. 2002; 92: 888-889. Gratton RJ, Gandley RE, McCarthy
Vasomotion
Genus of flowering plants
to manage dyspepsia by eliciting cephalic responses that increase vascular resistance and reduce the workload of the heart during digestion. Gentiana punctata
Gentiana
vascular resistance. This is possible due to the direct relationship between the cardiac output, mean arterial pressure and the vascular resistance.
Surface chemistry of microvasculature
Surface_chemistry_of_microvasculature
Hypertension occurring during pregnancy
have been assessed include those related to placental perfusion, vascular resistance, kidney dysfunction, endothelial dysfunction, and oxidative stress
Pre-eclampsia
Failure of the heart to provide sufficient blood flow throughout the body
low cardiac output with high systemic vascular resistance or high cardiac output with low vascular resistance (low-output heart failure vs. high-output
Heart_failure
Chronic disease of the liver, characterized by fibrosis
as sodium retention in kidneys) secondary to a fall in systemic vascular resistance. FibroTest is a biomarker for fibrosis that may be used instead of
Cirrhosis
Chemical compound
heart. Nebivolol lowers blood pressure (BP) by reducing peripheral vascular resistance, and significantly increases stroke volume with preservation of cardiac
Nebivolol
Concept in pharmacology and biochemistry
vasoconstriction to decrease peripheral vascular resistance, and prevent vascular fibrosis to decrease vascular stiffness. CCBs are vasodilators inhibiting
Additive_effect
Disease of the respiratory system
transition to extra-uterine life. It is marked by an elevated pulmonary vascular resistance and vasoconstriction causing a right-to-left shunt of the blood through
Respiratory_disease
systemic viral infection SVN small volume nebulizer SVR systemic vascular resistance SVT supraventricular tachycardia SW Sturge–Weber syndrome Sx symptoms
List of medical abbreviations: S
List_of_medical_abbreviations:_S
Medical condition
maternal blood flow is found elsewhere in the maternal vascular system. The high vascular resistance outside of the placenta leads to higher maternal blood
Gestational_hypertension
Human disease
Increased heart rate Vasodilation leading to decreased systemic vascular resistance, and high-output heart failure Elevated jugular venous pressure Dyspnea
Thiamine_deficiency
Dangerously low blood pressure due to damage from an organ infection
vasodilation, increased capillary permeability, decreased systemic vascular resistance, and low blood pressure. Finally, in an attempt to offset decreased
Septic_shock
Life-threatening response to infection
respiratory alkalosis), low blood pressure due to decreased systemic vascular resistance, higher cardiac output, and disorders in blood-clotting that may
Sepsis
Fainting due to low blood pressure
pharmacological treatment is to increase blood volume or peripheral vascular resistance and includes: Midodrine 2.5 to 15 mg orally once to thrice daily
Orthostatic_syncope
Deficit of total body water
receptors cause contractions in the peripheral vascular smooth muscle. This increases systemic vascular resistance and raises blood pressure. Dehydration occurs
Dehydration
Benzodiazepine used for anesthesia and procedural sedation
respiratory depression and hypotension due to a reduction in systematic vascular resistance, and an increase in heart rate can occur. If intravenous midazolam
Midazolam
Medical condition
have found that orthostatic hypertension may be caused by increased vascular resistance, possibly due to excess plasma shifts or increased blood viscosity
Orthostatic_hypertension
Two situations that lead to cyanosis in infants
children may squat to feel relief since this increases the systemic vascular resistance causing more blood to go towards the lungs, resulting in increased
Blue_baby_syndrome
Increase in blood flow to certain tissues in the body
local arterioles causing vasodilation, this causes a decrease in vascular resistance and allows an increase in blood flow to be directed toward the capillary
Hyperaemia
Human posture
allowing more blood to flow to the lungs. Squatting increases systemic vascular resistance and allows for a temporary reversal of the shunt. It increases pressure
Squatting_position
Alterations of vascular wall structures, often leading to elevated vascular resistance
Alterations of vascular wall structures, often leading to elevated vascular resistance
Microvasculature_remodeling
Alpha-adrenergic agonist
nervous system output from the brainstem, which lowers peripheral vascular resistance, heart rate and plasma renin activity, thereby reducing systolic
Clonidine
Human disease
these individuals, the pulmonary artery pressure (PAP) and pulmonary vascular resistance (PVR) were shown to be abnormally high. Microneurographic recordings
High-altitude_pulmonary_edema
Metalloprotein that binds with oxygen
influences various NO-related activities such as the control of vascular resistance, blood pressure and respiration. NO is not released in the cytoplasm
Hemoglobin
ANP Cardiac myocytes Reduce blood pressure by: reducing systemic vascular resistance, reducing blood water, sodium and fats Brain natriuretic peptide
List of human endocrine organs and actions
List_of_human_endocrine_organs_and_actions
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