0 relating to or happening in an atrium of the heart: --
Premature beats that occur in the atria are called premature atrial contractions.
This is when hearts with isomeric atrial appendages have each of their atriums connected directly to its own ventricle.
The second possibility is that a subclinical degree of tricuspid regurgitation led to hypertrophy and dilatation of the left atrium and precipitated atrial fibrillation.
Furthermore, with this variant atrial neoseptation, the living and contractile right atrial flap now acts as part of the newly formed left atrium.
Often, dextrocardia, complete atrioventricular septal defect, and transposed great arteries occur in both right atrial and left atrial isomerism.
This is 2:1 second degree atrioventricular block - every other atrial contraction is followed by a ventricular contraction (v).
The distinction between the two entities depends on whether the atrial septum walls off the left atrium from the atrioventricular junction.
The echocardiographic diagnosis was presence of a solitary ventricle with a single atrioventricular valve and an atrial septal defect.
At this stage, the wider curved end of the baffle is brought down onto the remnant of the atrial septum between the atrioventricular valves.
