Double heartbeat To be precise, it consists of two "stages" The first stage is the sound of the heart valve. The mitral valve (located between the left atrium and left ventricle) and the tricuspid valve (located between right atrium and right ventricle). The touching of the valve cusps creates a twangy sound. After a fraction of a second, blood flows through the heart and forms👇🏻 The second stage is the sound of the aortic valve (between the left ventricle and aorta) and the pulmonary valve (between the right ventricle and the pulmonary trunk) closing. Our NFT channel