Heart Sounds and Their Characteristics
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Questions and Answers

Where is the mitral component of the first heart sound best heard?

  • At the 2nd right costo-sternal junction at right sternal border
  • At the left lower end of sternum
  • At the left 5th intercostal space in mid-clavicular line (correct)
  • At the right 5th intercostal space in mid-clavicular line

    • Which phase of the heart cycle is characterized by isovolumetric relaxation?

  • Early rapid ejection phase
  • Isovolumetric contraction phase
  • Isovolumetric relaxation phase (correct)
  • Late ventricular ejection phase

    • What causes splitting of the first heart sound?

  • Left ventricular ejection ending before right ventricular ejection
  • Sudden closure of A-V valves
  • Sudden closure of semilunar valves (correct)
  • Aortic valve closing before pulmonary valve

    • Why is the splitting of the second heart sound more audible during inspiration?

    <p>Decreased intrathoracic pressure affecting pulmonary valve closure</p> Signup and view all the answers

    Which heart sound has a higher frequency?

    <p>Second heart sound (S2)</p> Signup and view all the answers

    Where is the tricuspid component of the first heart sound best heard?

    <p>At the left lower end of sternum</p> Signup and view all the answers

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