NUR 2462C Chapter Notes - Chapter 1: Carotid Sinus, Atrioventricular Node, Pr Interval
8 Jun 2020
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Associations: mi, cad, rheumatic fever, hyperthyroidis m, vagal stimulation. Dizziness, sob: may be precursor to higher degrees of av block. Sa node fires at a rate < 60 (hr < 60 bpm: carotid sinus, hypotension with massage, hypothermia, vagal stimulation, parasympathet ic stimulation decrease in co (e. g. , fatigue, dizziness, chest pain, syncope, confusion, sob, change in loc, Ccbs, digoxin) (latter 3 are if atropine is ineffective) Fibrillation (a-fib: vagal inhibition, stressors, anxiety, exercise, hypotension, hypovolemia, hyperthyroidis m, fever, pain, shock, mi, hypoxia, respiratory difficulties, cad, chf, pericarditis, cardiomyopat hy, rheumatic fever, caffeine, electrolytes. > 100 (usually a result of vagal inhibition) No p"s, usually irregular: dizziness, treat underlying cause (antipyretics, analgesics, bbs, anti- anxiety meds, fluids for dehydration) palpitations, Increased myocardial o2 consumption: may lead to angina, decrease co, especially with. Rate (rvr); high potential for thrombi formation: manual bps!, rvr control, prevent clots, anticoagulants, bbs, ccbs (diltiazem = monitor bp)
