Ch's 6-10 Flashcards
situs solitus
refers to the normal arrangement of vessels and organs within the body
Apical 4 CHRT
Allows optimal visualization of the apex of the hrt, the ventricles, the atrioventricular valves, and longitudinal atrial and ventricular dimensions
Basal 4 CHRT
Allows adequate visualization fo the atrial and the atrioventricular valves
Lateral (axial) view
Allows adequate visualization of the atrial and ventricular septa, atrial and ventricular walls, ventricular contractility, and septal thickness.
The width of the heart, at the level of the atrioventricular valves corresponds to…..
approximately the gestational age in weeks
situs inversus
refers to a mirror-image arrangement of organs and vessels to situs solitus. Situs inversus is associated with a slight increase in the incidence of complex congenial heart disease.
Situs ambiguous (heterotaxy)
refers to visceral malpositions and malformations different from situs solitus or inversus.
Dextrocardia
a term used to describe a heart that is located in the rt chest
mesocardia
refers to a central position of the heart in the chest
levocardia
refers to a lt sided position of the heart
dextropostion
a form of dextrocardia, describes a heart that is located in the rt chest with the apex pointing medially or to the lt.
dextroversion
describes a heart that is located in the rt chest with the cardiac axis pointing to the rt side
mesocardia
indicates an atypical location of the heart with the apex pointing toward the midline of the chest.
levocardia
a term denoting the normal position of the heart, is often used when visceral situs abnormalities are present.
levoposition
refers to the condition where the heart is displaced farther toward the lt chest, usually in association with a space occupying lession.
what is the fetal rib corresponding to the 4 chrt view?
the fourth thoracic rib
the width of the hear at the level of the atrioventricular valves…..
corresponds approximately to GA in weeks.
How can the fetal cardiac dimensions be easily assessed?
by measuring the ratio of cardiac circumference or area to the chest circumference or area obtained at the level of the 4CHRT view
what are the normal values of C/T area?
0.25 - 0.35
the coronary sinus
delivers venous return from the heart, runs across the atrioventricular groove posteriorly and enters the rt atrium inferiorly
the IAS can be recognized in which view?
the 4chrt view during diastole
Which veins drain directly into the heart?
SVC, IVC, CS, and PV’s
The DV….
is a thin hourglass-shaped fetal vessel that connects the UV to the heart.
When do we see the “U” sign in the 3VT view?
When a right-sided aortic arch is present; it can be found in combination with a lt ductus arteriosus. It can also be a sign of double aortic arch.
