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Cardiology
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A-wave = "atrial kick" - c-wave = bulge of tricuspid into ra (early systole) - v-wave = ra filling against closed tricuspid - x-descent = "descent of the base" (decreased ra pressure during systole) - y-descent = decline atrial pressure early diastole (tv open & flow ra to rv)
- ekg changes-either st elevation or depression or t wave flattening or inversion - - may exhibit signs of lv dysfunction - - chest pain
Caused by aberrant vent automatically or intra-ventricular reentry, can be sustained or paroxysmal (short run) wide qrs 100-200 bpm.
(a) initiation: ca binds troponin-c - -> increased troponin-c/troponin-i interaction = decreased troponin-i blockage of actin - (b) myosin/actin interaction - -> due to conformational changes in tropomyosin due to ca binding in step a - (c) power stroke - -> atp binding --> atpase activation - -> atp hydrolysis --> myosin head detachment from one actin and reattachment to another actin

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