5 Questions
Which sound has a duration of about 0.15 s and a frequency of 25–45 Hz?
First sound
What causes the second sound to be loud and sharp?
Elevated diastolic pressure in the aorta or pulmonary artery
What is the interval between aortic and pulmonary valve closure during inspiration called?
Reduplication of the second sound
In what condition does splitting of the second sound frequently occur?
Various diseases
When does the third sound occur?
After systole
Learn about the characteristics and causes of the first and second heart sounds in the cardiac cycle. Understand how these sounds are related to heart function and blood pressure.
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