USMLE Step 1 Physiology Review 56 02 Aortic and pulmonary arterial pressures

USMLE Step 1 Physiology Review 56 02 Aortic and pulmonary arterial pressures

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Begin 56 02 Aortic and pulmonary arterial pressures Transcription

Okay now we will talk about aortic and pulmonary arterial pressures. What is the term for the pulsatile pressure changes in the aorta and pulmonary arteries?

  • Pressure pulses.

Look at the aortic pressure curve and notice the notch as the aortic pressure curve begins to decline, what does the notch indicate?

  • It indicates the end of ventricular systole

What causes the notch in the aortic pressure curve?

  • The closure of the semilunar valve

What is the term of this notch it is similar to the name of the cutting teeth?

  • Incisura

What is the value for the normal diastolic pressure in the aorta?

  • 80mmHg

What is the normal diastolic pressure in the pulmonary artery?

  • 8-10mmHg

How do you derive the pulse pressure?

  • It is the difference between the systolic and diastolic pressures

How is the recorded blood pressure normally written?

  • Arterial systolic pressure over diastolic pressure.

Student doctor please pause the tape and summarize the information discussed about aortic and pulmonic arterial pressures.

  • The first question was about pulsatile pressures. Pressure pulses are the pulsatile pressure changes in the aorta and pulmonary arteries. The aortic pressure curve and notice the notch as the aortic pressure curve begins to decline, indicates the end of ventricular systole.  The closure of the semilunar valve is mirrored in the notch in the aortic pressure curve which is called Incisura. That is the notch in the curve is called Incisura. The value for the normal diastolic pressure in the aorta is 80mmHg while in the pulmonary artery it is 8-10mmHg. The pulse pressure is the difference between the systolic and diastolic pressures. Recorded blood pressure is normally written as Arterial systolic pressure over diastolic pressure.

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