Diary
Gavin Francis: Listening to the Heart, 6 March 2014
“... as systole), when blood is forced out of the ventricles and into the arteries. These valves are so broad they have thick cords like harp strings attached to their cusps to reinforce them. The second sound is made by the other two valves – the pulmonary and aortic – as they prevent backflow while the ventricles refill (diastole). Healthy cardiac valves ... ”