transmural pressure

trans·mu·ral pres·sure

pressure across the wall of a cardiac chamber or of a blood vessel. In the heart, transmural pressure is the result of the intracavitary pressure minus the extracavitary (that is, pericardial) pressure and is the distending, that is, true filling, pressure of the cardiac chamber of measurement when this is done during diastole. Given that the pericardial pressure normally approximates zero, the filling pressure usually equals ventricular diastolic mean pressure, obviating the complexities of measuring pericardial pressure.

trans·mu·ral pres·sure

(trans-myūr'ăl presh'ŭr)
The pressure difference across the chest wall; the difference between pressure in the pleural space and the pressure on the body surface (i.e., pleural pressure-body surface pressure).
References in periodicals archive ?
Cardiopulmonary baroreceptors trigger a reflex that causes vasoconstriction when the right atrial transmural pressure (RATP) decreases and vasodilation when RATP increases.
Collapse of transmural pressure receptors in the upper airway has been associated with enhancement of inspiratory activity.
The possible mechanism of action of CPAP may include improved myocardial oxygen delivery, decreased sympathetic activity, left ventricular transmural pressure, and afterload [28].
Accidental or deliberate dural puncture occurring during attempted epidural or spinal anesthesia, respectively, might have caused rupture of the cerebral AVM secondary to a change in transmural pressure [4].
Removal of a supratentorial space occupying mass: supratentorial mass resection reduces the intracranial pressure, hence increasing the transmural pressure of veins or venules, developing an RCH [21].
Adaptive changes in ,,reactivity"and volumen ratio in cat blood vessels exposed to prolonged transmural pressure difference.
The pressure applied by sleeves is transmitted into the tissue, thus reducing the transmural pressure gradient of the arterial vessels (29).
Resistance exercise, the Valsalva maneuver, and cerebrovascular transmural pressure. Medicine and Science in Sports and Exercise.
(26) Structural components within the arterial wall, mainly collagen and elastin, together with transmural pressure, are key determinants of large arterial PWV.
When the IJV is distended, the transmural pressure (i.e., the difference between the internal venous pressure and the atmospheric external pressure) and the CSA are correlated [42]; therefore, the time diagram of the IJV CSA reflects the JVP.
Another possible theory is that the increase in end-expiratory lung volume, which may lead to increased transmural pressure gradients, may be associated with better UA patency.