Heart Sounds II: Physiology Department
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Questions and Answers

What is the most common cause of chronic mitral regurgitation?

  • Pulmonary hypertension
  • Right ventricular hypertrophy
  • Chordae tendinae rupture
  • Mitral valve prolapse (correct)

In younger people with mitral valve prolapse, what is the usual cause?

  • Acquired mitral valve disease
  • Excess valve leaflet material (correct)
  • Congenital septal defects
  • Rupture of chordae tendinae

What can worsen regurgitation in individuals with mitral valve prolapse?

  • Septal defects
  • Lengthening and rupture of chordae tendinae (correct)
  • Pulmonary hypertension
  • Right ventricular hypertrophy

What may produce murmurs in individuals with septal defects?

<p>Flow of blood through septal defects (A)</p> Signup and view all the answers

What is the likely result when a septal defect is not accompanied by other abnormalities?

<p>Blood flow from right to left side (D)</p> Signup and view all the answers

What is the consequence of blood accumulation in the left atrium?

<p>Pulmonary hypertension (C)</p> Signup and view all the answers

What happens to compensate for increased pulmonary pressure?

<p>Right ventricular hypertrophy (C)</p> Signup and view all the answers

What can lead to pulmonary hypertension and edema?

<p>Right ventricular hypertrophy (C)</p> Signup and view all the answers

What produces the 'lub' sound of the heart?

<p>Closing of the AV valves (A)</p> Signup and view all the answers

When is the 'dub' sound of the heart heard?

<p>During diastole (C)</p> Signup and view all the answers

What is the most common cause of murmurs in the heart?

<p>Defective heart valves (D)</p> Signup and view all the answers

What can cause defective heart valves?

<p>All of the above (D)</p> Signup and view all the answers

In which phase do the semilunar valves close to produce the 'dub' sound?

<p>Isovolumetric relaxation (C)</p> Signup and view all the answers

What happens in mitral stenosis?

<p>The mitral valve becomes thickened and calcified. (D)</p> Signup and view all the answers

What causes damage to the heart valves in rheumatic endocarditis?

<p>Antibodies made in response to an infection by streptococcus bacteria (B)</p> Signup and view all the answers

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