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8 Cards in this Set
- Front
- Back
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When is blood pressure highest? |
when LT V is contracting and pushing blood out (systolic) |
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CO (cardiac output)= |
vol of blood pumped/min
SV x HR |
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BP= |
SVxHRxPVR |
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Blood Pressure Regulators: |
1. SYMP. nervous system (baroreceptors send message to medulla --> sends SYMP output --> interact with receptors --> B1= incr. HR = incr. CO OR a1= incr. vasoconstriction = inv. PVR --> incr. BP
2. antidirectic hormones --> INCR. blood in, INCR. blood out (Frank-Starling Mech.)
3. Renin-angiotension-aldosterone --> incr. PVR |
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Vasodilator or Vasoconstrictor?
Nitric oxide: Angiotension II: Bradykinin: Prostaglandin E:
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vasodilator vasoconstrictor Vasodilator Vasodilator |
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Stable vs Unstable Angia vs MI |
Stable: slight occlusion= chest pain only during work, stops at rest ((CHRONIC)) --> quickly
Unstable: slightly more occluded= chest pain during rest or won't stop at rest ((ACUTE)) --> quickly
MI: necrotic part of heart ((ACUTE)) |
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LT vs RT Heart Failure: |
RT usually occurs because of LT When the left ventricle fails, increased fluid pressure is, moved back through the lungs, ultimately damaging the heart's right side.
When the right side loses pumping power, blood backs up in the body's veins. This usually causes swelling in the legs and ankles (affects venules and capillaries) LIVER WILL BE 1st ORGAN AFFECTED --> hepatomegaly |
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Types of Shock:
Hypovolemic Cardiogenic Ostructive |
Hypovolemic: severe vasoconst.-- acute blood loss -- decr. CO
Cardiogenic: when heart fails to pump blood to meet demand -- MI -- decr. CO
Obstructive: loss of bv tone, enlargement of peripheral vasc. comp., displacement -- decr. PVR |
