aortic impedance

impedance /im·ped·ance/ (im-pēd´ans) obstruction or opposition to passage or flow, as of an electric current or other form of energy. Symbol Z .

acoustic impedance an expression of the opposition to passage of sound waves, being the product of the density of a substance and the velocity of sound in it.

aortic impedance the sum of the external factors that resist ventricular ejection.

impedance

[impē′dəns]

Etymology: L, impedire, to entangle

a form of electric resistance observed in an alternating current that is analogous to the classic electric resistance that occurs in a direct current circuit. It is expressed as a ratio of voltage applied to a circuit to the current it produces, as an alternating current oscillates ahead of or behind the voltage.

impedance [im-pe´dans]

1. obstruction or opposition to passage or flow, as of an electric current or other form of energy.

2. the resistance in alternating current circuits, represented by the letter Z in mathematical formulas. Medical equipment is often rated according to impedance to allow for optimum performance by matching impedance ratings. A transformer can be used between components to cause the impedances of unequal systems to match.

acoustic impedance an expression of the opposition to passage of sound waves, being the product of the density of a substance and the velocity of sound in it.

impedance

obstruction or opposition to passage or flow, as of an electric current or other form of energy.

acoustic impedance

an expression of the opposition to passage of sound waves, being the product of the density of a substance and the velocity of sound in it.

Impedance

Cardiac pacing The total opposition that a circuit presents to alternating electrical current. Cf Resistance.

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acoustic impedance
angle of incidence
BIA
bioelectrical impedance
deep vein thrombosis
electric impedance
electrohemodynamics
impedance audiometry
Impedance Phlebography
impedance plethysmography
ocular hypertension
ohm
Ohm's law
plethysmography
pointfinder
rayl
real-time telemetry
reflection
renal hypertension

aortic dissection
aortic dissection
aortic dissection
aortic ectasia
Aortic Effective Orifice Area
aortic embolism
aortic embolism
Aortic End Diastolic Pressure
Aortic Flow Time Velocity Integral
aortic foramen
aortic foramen
aortic foramen
aortic foramen
Aortic Forward Flow Mapping Area
Aortic glands
Aortic glands
aortic glomus
aortic glomus
aortic glomus
aortic glycosaminoglycans
Aortic hiatus
Aortic hiatus
Aortic hiatus
Aortic hiatus
Aortic hiatus
aortic hiatus, hiatus aorticus
aortic hiatus, hiatus aorticus
aortic hiatus, hiatus aorticus
aortic hiatus, hiatus aorticus
aortic hiatus, hiatus aorticus

aortic impedance

Aortic Incompetence
Aortic Incompetence
Aortic Incompetence
Aortic Incompetence
Aortic Incompetence
aortic insufficiency
aortic insufficiency
aortic insufficiency
aortic insufficiency
aortic isthmus
aortic isthmus
aortic isthmus
aortic isthmus
aortic mineralization
aortic mineralization
aortic murmur
aortic murmur
aortic murmur
aortic murmur
aortic nerve
aortic nerve
Aortic Nipple Sign
aortic notch
aortic notch
aortic notch
aortic obstruction
aortic occlusion
Aortic opening
Aortic opening
Aortic opening

impedance (redirected from aortic impedance)

impedance
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