6 Questions
Where is the mitral component of the first heart sound best heard?
At the left 5th intercostal space in mid-clavicular line
Which phase of the heart cycle is characterized by isovolumetric relaxation?
Isovolumetric relaxation phase
What causes splitting of the first heart sound?
Sudden closure of semilunar valves
Why is the splitting of the second heart sound more audible during inspiration?
Decreased intrathoracic pressure affecting pulmonary valve closure
Which heart sound has a higher frequency?
Second heart sound (S2)
Where is the tricuspid component of the first heart sound best heard?
At the left lower end of sternum
Learn about the characteristics of heart sounds heard normally with a stethoscope, including the causes, timing, characters, and duration of the first (S1) and second (S2) heart sounds.
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