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Lecture 11 Blood Pressure

Lecture 11 Blood Pressure - Lecture 11 Blood Pressure...

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Lecture 11 Blood Pressure Korotkov sounds – actually transitions between sounds I. Silence to loud tapping sound II. Loud tapping to muffled tapping III. Muffled tapping to silence again I systolic III diastolic >140/90 high blood pressure 130-39/85-89 high normal 120-125/80-84 normal <120/80 optimal Too low not good hard to define though Changes in blood pressure based on breathing in/out Inhale lungs stretch blood pools in lung vasculature Decrease in VR to left ventricle Pump out less blood through systemic circulation Decrease in blood pressure Exhale Increase intrathoracic pressure, close out lung beds Pooled blood pushed into LV Increase BP Fairly small Exhale – Inhale <10 mmHg Valsalva – hold breath Test to see if sympathetic/parasympathetic nervous system is working normally If someone is dizzy sympathetic system will help that person not get dizzy when they stand up by increasing blood pressure Dehydration – not enough fluid/blood volume, so decrease in BP Onset of holding breath –
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