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Which of the following best defines the cardiac cycle?

  • The sequence of electrical and mechanical events occurring in the heart during a single beat. (correct)
  • The changes in volume, pressure, and flow in different chambers of the heart.
  • The recording of electrical activities in the form of ECG.
  • The resulting changes in volume, pressure, and flow in the aorta.

    • What is the purpose of drawing the changes in left atrial and ventricular pressures, aortic pressure, left ventricular volume, aortic blood flow, JVP, heart sounds, and ECG of a cardiac cycle on the same time scale?

  • To measure the exact duration of each phase of the cardiac cycle.
  • To compare the changes in different parameters between different cardiac cycles.
  • To identify abnormalities in the heart's electrical activities.
  • To visualize the relationship between different parameters during the cardiac cycle. (correct)

    • Which of the following best describes the pressure-volume relationship of the left ventricle?

  • As ventricular volume decreases, ventricular pressure decreases.
  • As ventricular volume increases, ventricular pressure decreases.
  • As ventricular volume decreases, ventricular pressure increases.
  • As ventricular volume increases, ventricular pressure increases. (correct)

    • What are the waves of JVP and what causes them?

    <p>A, B, C waves; caused by the closure of heart valves.</p> Signup and view all the answers

    What is the significance of heart sounds?

    <p>Heart sounds are normal sounds that indicate the opening and closing of heart valves.</p> Signup and view all the answers

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