mitral orifice


Also found in: Dictionary, Thesaurus, Encyclopedia.
Related to mitral orifice: mitral stenosis

orifice

 [or´ĭ-fis]
1. the entrance or outlet of any body cavity.
2. any opening or meatus. adj., adj orific´ial.
aortic orifice the opening of the left ventricle into the aorta; called also aortic opening.
external urethral orifice urinary meatus.
internal urethral orifice the opening from the urinary bladder into the urethra at one corner of the trigone of the bladder.
left atrioventricular orifice (mitral orifice) the opening between the left atrium and ventricle of the heart.
pulmonary orifice (orifice of pulmonary trunk) the opening between the pulmonary trunk and the right ventricle of the heart; called also opening of pulmonary trunk.
right atrioventricular orifice (tricuspid orifice) the opening between the right atrium and ventricle of the heart.
ureteral orifice the opening of a ureter into the urinary bladder at one corner of the trigone of the bladder. Called also ureteral meatus.

left atrioventricular orifice

[TA]
an atrioventricular opening that leads from the left atrium into the left ventricle of the heart.

mi·tral or·i·fice

(mī'trăl ōr'i-fis)
The atrioventricular opening that leads from the left atrium into the left ventricle of the heart.

mitral orifice

The opening between the left atrium and the left ventricle.
See also: orifice
References in periodicals archive ?
Interference with flow through the mitral orifice may mimic signs of mitral stenosis, including signs of pulmonary congestion, diastolic apical rumble, opening snap, and accentuated first heart sounds.
From there, the cancer can continue into the mitral orifice, sometimes causing obstruction (77, 78) (Figure 14).
Invasion of pulmonary veins with extension into the left atrium and mitral orifice.