0 any of the spaces inside the head that are connected to the back of the nose
1 the sinoatrial node (= tissue in the heart responsible for the heart's rhythm):
The electrocardiogram will confirm sinus bradycardia.
2 any of the hollow spaces in the bones of the head that open into the nose
This rotation moves the right coronary sinus leftwards and superiorly beneath the outlet septum, which misses its lower attachment.
There was no evidence of impaired sinoatrial conduction, sinus nodal dysfunction or incomplete sinus node suppression during overdrive stimulation.
In patients with large pericardial effusions, however, clear identification of the site of drainage of the coronary sinus was difficult.
The sagittal sinus was cannulated through a coronary excision in the skull.
The sinus extended through the tumour (?) to the peritoneal cavity.
All measurements were performed under conditions of steady state, in sinus rhythm, and prior to angiography.
Accordingly, no different incidence of arrhythmias such as sick sinus syndrome, sinus bradycardia, junctional rhythm, or a wandering pacemaker should be expected.
Only one patient had a sinus venosus defect in addition to the defect within the oval fossa.
