a heart murmur
The aortic pressure increases and the AV valves close.
the valves close
AV valves close
lub dub lub is when the av valves close and dub is when the semi lunar valves close
AV valves close during the systole phase of the cardiac cycle.
A murmur would occur during the lubb portion of the cycle if the AV valves were not closing properly. Most heart murmurs do not cause the patient any problems.
Open so the ventricle can receive more blood to pump.
A murmur would occur during the lubb portion of the cycle if the AV valves were not closing properly. Most heart murmurs do not cause the patient any problems.
at the end
depends on the person
The lubb sound happens when the ventricles relax and the AV valves close.