Atrioventricular canal cushion
atrioventricular canal cushion
atrioventricular canal cushion n.
Either of a pair of mounds of embryonic connective tissue covered by endothelium, bulging dorsally and ventrally into the embryonic atrioventricular canal, eventually growing together and dividing the canal into right and left atria. Also called endocardial cushion.
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- Atrioventricular conduction
atrioventricular conduction atrioventricular conduction n. Abbr. Forward conduction of the cardiac impulse from the atria to ventricles via the atrioventricular node, represented in an electrocardiogram by the P-R interval.
- Atrioventricular dissociation
atrioventricular dissociation atrioventricular dissociation n. A condition in which the atria and ventricles contract independently, especially as resulting from the slowing of an atrial pacemaker or the acceleration of a ventricular pacemaker.
- Atrioventricular extrasystole
atrioventricular extrasystole atrioventricular extrasystole n. A premature contraction of the heart in which the stimulus arises from either the A-V node or A-V bundle. Also called A-V extrasystole.
- Atrioventricular groove
atrioventricular groove atrioventricular groove n. See coronary sulcus.
- Atrioventricular interval
atrioventricular interval atrioventricular interval n. The time from the beginning of atrial systole to the beginning of ventricular systole as measured on an electrocardiogram.