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*  Pathophysiology of heart failure
In diastolic dysfunction, the end-diastolic ventricular pressure will be high. This increase in volume or pressure backs up to ... The failure of ventricular relaxation also results in elevated end-diastolic pressures, and the end result is identical to the ... ventricular end-diastolic pressure and volumes increase. This is transmitted to the atrium. On the left side of the heart, the ... early-to-atrial left ventricular filling ratio), the E (early left ventricular filling) deceleration time, and the isovolumic ...
*  Vincent DePaul Lynch
Method for determination of right ventricular pressure in the guinea pig". Journal of Pharmaceutical Sciences. 56 (4): 477-483 ...
*  Autoregulation
Via the Anrep effect, positive inotropy occurs secondary to increased ventricular pressure. This is in contrast to heterometric ... "Pressure autoregulation, intracranial pressure, and brain tissue oxygenation in children with severe traumatic brain injury". ... In this way, the same flow through the coronary circulation is maintained over a range of pressures. This part of coronary ... are involved in maintaining an appropriate cerebral blood pressure. Brain blood flow autoregulation is abolished in several ...
*  Pressure overload
... while a right ventricular heave suggests right ventricular pressure overload. Other signs provide evidence for specific causes ... "Left Heart Volume and Mass Quantification in Children with Left Ventricular Pressure Overload". Circulation. 41: 203-12. doi: ... Pressure overload may affect any of the four chambers of the heart, though the term is most commonly applied to one of the two ... A narrow pulse pressure is a sign of aortic stenosis. The chest x-ray may show pulmonary hyperaemia in the case of pulmonary ...
*  Pulmonary artery catheter
See also pulmonary wedge pressure and ventricular pressure. The idea for a sail or balloon tip modification of Ronald Bradley's ... Left ventricular end diastolic pressure (LVedp) is measured using a different procedure, with a catheter that has directly ... acute mitral regurgitation Severe left ventricular failure Right ventricular infarction Unstable angina Refractory ventricular ... and the filling pressure ("wedge" pressure) of the left atrium. The pulmonary artery catheter is frequently referred to as a ...
*  Tricuspid insufficiency
An echocardiogram will assess the chambers of the heart, as well as, right ventricular pressure. Cardiac magnetic resonance may ... Other common causes of right ventricular dilation include right ventricular infarction, inferior myocardial infarction, and cor ... However, the murmur may be inaudible indicating the relatively low pressures in the right side of the heart. A third heart ... Much more common than a congenital abnormality of the valve, however, is right ventricular dilatation of any cause. Such ...
*  Southern bluefin tuna
Their ventricles are large, thick-walled, and pyramidal in shape, allowing for generation of high ventricular pressures. The ... The standard osmotic pressure of seawater is 1.0 osmole/L, while the osmotic pressure in the blood plasma of the southern ... Since the osmotic pressure of the fluids in the tuna must be hyposmotic to the seawater that has been taken up, there is a net ... Tunas have the highest arterial blood pressure among all fishes, due to a high resistance of blood flow in the gills. They also ...
*  Earl Wood
M-1 maneuver consisted of a strained exhalation effort against a closed glottis designed to increase left ventricular pressure ... and calculated by subtracting pulmonary capillary wedge pressure from the mean pulmonary arterial pressure and dividing by the ... "The relationship between pulmonary artery wedge pressure and left atrial pressure in man". Circ. Res. 2 (5): 434-440. doi: ... The effect of anti-blackout suits on blood pressure changes produced on the human centrifuge. Fed Proc. 1946;5(1 Pt 2):115. ...
*  Aortic stenosis
With continued increases in ventricular pressure, dilatation of the ventricle will occur, and a third heart sound may be ... Due to increases in left ventricular pressure from the stenotic aortic valve, over time the ventricle may hypertrophy, ... that is caused by the constant production of increased pressure required to overcome the pressure gradient caused by the AS. ... Low blood pressure or syncope may ensue. Aortic stenosis is most commonly caused by age-related progressive calcification (>50 ...
*  Heart failure
If the right ventricular pressure is increased, a parasternal heave may be present, signifying the compensatory increase in ... The circulatory overload caused, can result in an increased left ventricular diastolic pressure which can develop into ... Right ventricular failure is not as deleterious to the other side, but neither is it harmless. Heart failure may also occur in ... A ventricular assist device or occasionally a heart transplant may be recommended in those with severe disease despite all ...
*  Ventricular septal defect
This situation occurs a) in the fetus (when the right and left ventricular pressures are essentially equal), b) for a short ... A ventricular septal defect (VSD) is a defect in the ventricular septum, the wall dividing the left and right ventricles of the ... Membranous ventricular septal defects are more common than muscular ventricular septal defects, and are the most common ... The classification is based on the location of the VSD on the right ventricular surface of the inter ventricular septum and is ...
*  Pressure-volume loop analysis in cardiology
The ventricular systolic pressure remains normal, diastolic pressure is elevated and the cardiac output is reduced. Aortic ... Thus, high fidelity pressure transducers are required to obtain real time instantaneous ventricular pressures. Calculation of ... This results in much greater LV pressures than the aortic pressures during LV ejection. The magnitude of the pressure gradient ... such as in ventricular hypertrophy), the ventricle is stiffer. This results in higher ventricular end-diastolic pressures (EDP ...
*  Autar Singh Paintal
Paintal discovered several sensory receptors including atrial B receptors, pulmonary J-receptors, ventricular pressure ...
*  Coronary circulation
... since the right ventricular pressure is less than the diastolic blood pressure. The heart regulates the amount of vasodilation ... are compressed due to the high ventricular pressures. This compression results in momentary retrograde blood flow (i.e., blood ... Because of this, blood flow in the subendocardium stops during ventricular contraction. As a result, most myocardial perfusion ... During contraction of the ventricular myocardium (systole), the subendocardial coronary vessels (the vessels that enter the ...
*  Vortex ring
Kheradvar, A., Gharib, M. Influence of ventricular pressure-drop on mitral annulus dynamics through the process of vortex ring ... Kim, W.Y., Walker, P.G., Pedersen, E.M., Poulsen, J.K., Oyre, S., Houlind, K., Yoganathan, A.P., 1995, Left ventricular blood ... Correlation between vortex ring formation and mitral annulus dynamics during ventricular rapid filling, ASAIO Journal, Jan-Feb ...
*  Right-to-left shunt
... so the right ventricular pressure becomes higher than the pressure in the left ventricle. Because of this switch in the ... right heart pressure is higher than left heart pressure and/or the shunt has a one-way valvular opening. Small physiological, ... This is seen in Ventricular septal defect, Atrial septal defect, and patent ductus arteriosus, and can manifest as late as ... Ventricular septal defect (a hole exists in the septum that divides the left and right ventricles) Early cyanosis is a symptom ...
*  Salomón Hakim
"Decreases in Ventricular Volume Correlate with Decreases in Ventricular Pressure in Idiopathic Normal Pressure Hydrocephalus ... valve which may prevent ventricular collapse when the pressure of the CSF is too low. Hakim's findings and inventions brought ... Hakim improved and developed an unidirectional valve with the capacity to regulate the CSF pressure by adding a spring pressure ... In 1957, he finally realized that these patients suffered from what is now known as normal pressure hydrocephalus (NPH) after ...
*  Reptile
Because of this ridge, some of these squamates are capable of producing ventricular pressure differentials that are equivalent ... When the turtle protracts its limbs, the pressure inside the lungs is reduced, and the turtle can suck air in. Turtle lungs are ... This is made possible by a muscular ridge that subdivides the ventricle during ventricular diastole and completely divides it ... Wang, Tobias; Altimiras, Jordi; Klein, Wilfried; Axelsson, Michael (2003). "Ventricular haemodynamics in Python molurus: ...
*  Left atrial enlargement
See p. 2560 Left ventricular filling pressure, LAV, and AF. Latina JM, Estes III NAM, Garlitski AC (2013). "The Relationship ... The negative intrathoracic pressure may cause the left atrium to expand and stretch its walls during each OSA event. Over time ... When an OSA event occurs, an attempt is made to breathe with an obstructed airway and the pressure inside the chest is suddenly ...
*  MYL4
... by enhancing left ventricular developed pressure, maximal velocity of pressure development and relaxation. MYL4 expression in ... as well as left ventricular developed pressure in Langendorff heart preparations. Importantly, overexpression of ALC-1 was ... ALC-1 expression also correlated with left ventricular systolic pressure. Additionally, in patients with ischemic ... Relative to ventricular essential light chain VLC-1, ALC-1 has an additional ~40 amino-acid N-terminal region that contains ...
*  Isovolumetric contraction
The net result is that, while contraction causes ventricular pressures to rise sharply, there is no overall change in volume ... As diastole ends, the ventricles begin depolarizing and, while ventricular pressure starts to rise owing to contraction, the ... Isovolumetric relaxation Cardiac cycle Blood pressure Wiggers diagram Pocock, J., and Richards, C.D. (2006). Human Physiology, ... but this short period of time is enough to build up a sufficiently high pressure that eventually overcomes that of the aorta ...
*  Aortic insufficiency
This relaxation of the left ventricle (early ventricular diastole) causes a fall in its pressure. When the pressure in the left ... While diastolic blood pressure is diminished and the pulse pressure widens, systolic blood pressure generally remains normal or ... After ventricular systole, the pressure in the left ventricle decreases as it relaxes and begins to fill up with blood from the ... The left ventricular filling pressures will revert to normal and the individual will no longer have overt heart failure. In ...
*  E/A ratio
... which open to allow blood into the ventricles and close when ventricular pressure exceeds atrial pressure. Blood is transferred ... In certain pathologies and with aging, the left ventricular wall can become stiff, increasing the back pressure as it fills, ... but remember that the main factor is the driving gradient between the atrial and ventricular pressure. The E/A ratio is ... the pressure in the ventricle becomes less than the pressure in the atria. This causes the leaflets of the Atrioventricular ...
*  Ventricle (heart)
Right ventricular pressure demonstrates a different pressure-volume loop than left ventricular pressure. The heart and its ... ventricular pressure is less than the pressure in the aorta, but during systole, the ventricular pressure rapidly increases, ... An elevated pressure difference between the aortic pressure and the left ventricular pressure may be indicative of Aortic ... Ventricular pressure is a measure of blood pressure within the ventricles of the heart. During most of the cardiac cycle, ...
*  PowerLab
... for specific research areas such as spirometry and ventricular pressure). The last version of LabChart6 (version 6.1.3) was ... blood pressure, cardiac output, HRV etc. Smaller software plugins provide additional and specialized functionality to LabChart ...
*  Brain ischemia
Extremely low blood pressure can also result from drug overdose and reactions to drugs. Therefore, brain ischemia can result ... Ventricular tachycardia represents a series of irregular heartbeats that may cause the heart to completely shut down resulting ... Systemic blood pressure (or slightly above) should be maintained so that cerebral blood flow is restored. Also, hypoxaemia and ... Extremely low blood pressure usually represents the inadequate oxygenation of tissues. Untreated heart attacks may slow blood ...