New Real Estate Listings In New Rochelle. 1  $1,165,00022 Verdun Ave4 Bed | 3 Bath | 3302 SqFt. 2  $665,000185 Pershing Ave5 Bed | 3 Bath | 1962 SqFt. 3  $799,000173 Highridge Rd4 Bed | 3 Bath | 2267 SqFt. 4  $169,90061 White Oak St APT 5F2 Bed | 1 Bath | 1000 SqFt. 5  $174,90061 White Oak St APT 2D2 Bed | 1 Bath | 1000 SqFt.
When the ventricles contract, atrioventricular valves close to prevent blood from flowing back into the atria. When the ventricles relax, semilunar valves close to prevent blood from flowing back into the ventricles.
Atrioventricular node. The atrioventricular (AV) node is a part of the electrical conduction system of the heart that coordinates the top of the heart. It electrically connects the right atrium and right ventricle. The AV node lies at the lower back section of the interatrial septum near the opening of the coronary sinus, which conducts the normal electrical impulse from the atria to the ventricles. The AV node is quite compact (~1 x 3 x 5 mm).