Ukulele Festival Hawaii. This annual Waikiki festival honors Hawaii's beloved musical instrument. Photo: Tina Mahina. Photo: Tina Mahina. The ukulele is Hawaiiâs best-loved musical instrument, so it makes sense that Ukulele Festival Hawaii is the worldâs largest, attracting enthusiasts from as far away as Italy and Thailand.
atrioventricular (AV) valve, a valve in the heart through which blood flows from the atria to the ventricles. The valve between the left atrium and left ventricle is the mitral (bicuspid) valve; the right AV valve is the tricuspid valve. 1  Facebook. 2  Twitter.
Atrioventricular node: The electrical relay station between the upper and lower chambers of the heart. Abbreviated AV node. Electrical signals from the atria must pass through the AV node to reach the ventricles.The AV node, which controls the heart rate, is one of the major elements in the cardiac conduction system.The AV node serves as an electrical relay station, slowing the electrical current sent by the sinoatrial (SA) node before the signal is permitted to pass down through to the ventricles.lectrical signals from the atria must pass through the AV node to reach the ventricles. The AV node, which controls the heart rate, is one of the major elements in the cardiac conduction system.