II. Physiology
- S1 Heart Sound represents closure of the mitral and tricuspid valves
III. Causes: S1 Augmented
IV. Causes: S1 Diminished
V. Causes: S1 Variable
- Third degree AV Block
- Atrial Fibrillation
VI. Examples
- S1 with Wide Split
VII. Resources
- University of Michigan Heart Sound and Murmur Library