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#1
09-15-2011
 USMLE Forums Scout Steps History: Not yet Posts: 35 Threads: 5 Thanked 16 Times in 8 Posts Reputation: 26
Mean Arterial Pressure versus Mean Systemic Filling Pressure?

What is the difference between mean arterial blood pressure and mean systemic pressure?

Is mean systemic pressure the pressure driving the bloodflow back to the heart to create venous return?

#2
09-15-2011
 USMLE Forums Veteran Steps History: 1+CK+CS Posts: 262 Threads: 6 Thanked 370 Times in 154 Posts Reputation: 380

The mean arterial blood pressure:
It's the average of blood pressure during a cardiac cycle (systolic+diastolic/2) It's usually 70-100 mmHg.

The mean systemic filling pressure:
The pressure in the circulation when the heart stops, it's usually 5-10 mmHg. It's the pressure that drives the venous return.
It has been explained very nice by Sabio here
Cardiac Output - Venous Return Curves
 The above post was thanked by: erickven (01-07-2016), nakeya52 (08-05-2013), skido (09-15-2011), sm3356 (06-11-2015)
#3
09-15-2011
 USMLE Forums Scout Steps History: Not yet Posts: 35 Threads: 5 Thanked 16 Times in 8 Posts Reputation: 26

Quote:
 Originally Posted by Hokolesqua The mean arterial blood pressure: It's the average of blood pressure during a cardiac cycle (systolic+diastolic/2) It's usually 70-100 mmHg. The mean systemic filling pressure: The pressure in the circulation when the heart stops, it's usually 5-10 mmHg. It's the pressure that drives the venous return. It has been explained very nice by Sabio here Cardiac Output - Venous Return Curves
Thanks for the reply but I think the MABP should be DBP + 1/3 (SBP-DBP) since diastolic time is longer
 The above post was thanked by: erickven (12-10-2015)

 Tags Cardiovascular-, Physiology-

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