NURS 3664 Lecture Notes - Lecture 6: Unstable Angina, Coronary Circulation, Cardiac Marker
Document Summary
In ischemic conditions, heart cells are viable for approximately 20 minutes. Ethology and pathophysiology: deterioration of once stable plague, rupture, platelet aggregation, thrombus, result, partial occlusion of coronary artery: ua or nstemi, total occlusion of coronary artery: stemi. Increase in frequency, duration, or with less effort: new in onset, occurs at rest, pain lasting > 10 minutes, needs immediate treatment, symptoms in women often under-recognized. 1: an older patient may experience a change in mental status (e. g. , confusion), shortness of breath, pulmonary edema, dizziness, or a dysrhythmia, catecholamine release and stimulation of sns (epi and norepi, release of glycogen, diaphoresis. Increased hr and bp: may later drop due to decreased cardiac output. If severe enough decreased renal perfusion and urine output: vasoconstriction of peripheral blood vessels, skin: ashen, clammy, and/or cool to touch, cardiovascular, crackles. Initially, hr and bp, then bp (secondary to in co)
