title: The embryonic vertebrate heart tube is a dynamic suction pump.
abstract: The embryonic vertebrate heart begins pumping blood long before the development of discernable chambers and valves. At these early stages, the heart tube has been described as a peristaltic pump. Recent advances in confocal laser scanning microscopy and four-dimensional visualization have warranted another look at early cardiac structure and function. We examined the movement of cells in the embryonic zebrafish heart tube and the flow of blood through the heart and obtained results that contradict peristalsis as a pumping mechanism in the embryonic heart. We propose a more likely explanation of early cardiac dynamics in which the pumping action results from suction due to elastic wave propagation in the heart tube.
authors: Option in Bioengineering, Beckman Institute, Pasadena, CA 91125, USA.
authors: Arian S
authors: AS
authors: Forouhar
authors: Michael
authors: M
authors: Liebling
authors: Anna
authors: A
authors: Hickerson
authors: Abbas
authors: A
authors: Nasiraei-Moghaddam
authors: Huai-Jen
authors: HJ
authors: Tsai
authors: Jay R
authors: JR
authors: Hove
authors: Scott E
authors: SE
authors: Fraser
authors: Mary E
authors: ME
authors: Dickinson
authors: Morteza
authors: M
authors: Gharib