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 Valves Function. Av Valves Function. There are four valves, pulmonary, mitrial,tricuspid and aortic in the heart. There is an AV(atrioventricular) node within the heart. When the heart is in diastole, at rest 1/10th second, an electrical impulse begins to emanate from the sinoatrial node. Atrial systole is bought about by the impulse for the sinoatrial node spreading over the artia.