what is the lub sound of the heart
Heart sounds In healthy adults, there are two normal heart sounds often described as a lub and a dub (or dup), that occur in sequence with each heartbeat. These are the first heart sound (S1) and second heart sound (S2), produced by the closing of the atrioventricular valves and semilunar valves, respectively. In addition to these normal sounds, a variety of other sounds may be present including heart murmurs, adventitious sounds, and gallop rhythms S3 and S4.
The Sound of Music (film) While they are on their honeymoon, Max enters the children in the Salzburg Festival against their father's wishes. When they learn that Austria has been annexed by the Third Reich in the Anschluss, the couple return to their home, where a telegram awaits informing the Captain that he must report to the German Naval base at Bremerhaven to accept a commission in the German Navy. Strongly opposed to the Nazis and the Anschluss, the Captain tells his family they must leave Austria immediately. That night, as the von Trapp family attempt to leave, they are stopped by a group of Brownshirts waiting outside the villa. When questioned by Gauleiter Hans Zeller, the Captain maintains they are headed to the Salzburg Festival to perform. Zeller insists on escorting them to the festival, after which his men will accompany the Captain to Bremerhaven.