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1. describe the sounds of each of the following heart valves in terms of intensity (loudness,) pitch (frequency) and duration (length). begin with the aortic valve and compare others to it. this is a subjective description.



Answer :

The sounds of each of the following heart valves in terms of intensity (loudness,) pitch (frequency) and duration (length) is mentioned below

1. First heart sound

  • Heard dull. Described as LUB.
  • At the beginning of the ventricular systole
  • Frequency: 30-80 cps
  • Varies from 0.09 to 0.16 second.

2. Second Heart sound

  • Sharp, described as DUB
  • At the end of ventricular systole
  • Duration 0.11 sec
  • Frequency- 150 to 200 cps.
  • Due to closure of semilunar valves.

3.  Third heart sound

  • Heard often. Weak and rumbling in nature.
  • Frequency below 40 cps
  • Duration 0.04sec
  • Heart as lub-dub-ta

4. Fourth heart sound

  • Weak and rumbling.
  • When atria contracts
  • Frequency- 20cps

Therefore, the sounds of each of the following heart valves in terms of intensity (loudness,) pitch (frequency) and duration (length) is mentioned above

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