What is the sequence of closure and opening of the various valves at
the time of S1?
In sequence:
Mitral closure (M1)
Tricuspid closure (T1)
Pulmonic opening
Aortic opening
The first two events are the only real contributors to S1, whereas the last two may become audible (as
ejection clicks/sounds) in case of disease.
the time of S1?
In sequence:
Mitral closure (M1)
Tricuspid closure (T1)
Pulmonic opening
Aortic opening
The first two events are the only real contributors to S1, whereas the last two may become audible (as
ejection clicks/sounds) in case of disease.