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14 Cards in this Set
- Front
- Back
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P wave |
-Just before atrial contraction |
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QRS complex |
-Begins prior to ventricular contraction -Systole |
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T wave |
-Just before ventricular relaxation -diastole |
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1.Ventricular filling phase |
-Pressure in aorta falls -pressure in atria and ventricle low -Pressure in left atrium exceeds pressure in left ventricle ---> mitral valve opens -All blood did not leave from last time (LVESV) -Blood volume quickly doubles (RVF) |
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2. Slow ventricular filling phase (Diastasis) |
-pressures remain low but atria exceeds ventricle -Mitral valve remains open and LV volume increases slightly |
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3. Atrial contraction phase |
-"A" wave -Mitral valve open, aortic valve closed -Atria contract----> increase LA pressure, LV pressure, and LV volume (5-10%) |
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4. Isovolumetric Contraction phase |
-"C" wave -small rise of pressure in right atria because mitral valve bulges into atria -Start of systole (LV contraction) -Pressure rises in LV ---> mitral valve closes (S1) -Both valves closed ---> no volume change -Volume in Ventricle = EDV |
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5. Rapid Ventricular ejection phase |
-LV pressure steadily increases ----> valve remains open -LV contracts -LV volume decreases -Aortic pressure and volume increase |
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6. Slow ventricular ejection phase |
-LV ejection decreases ---> LV pressure and Aortic pressure decrease -LV volume decreases slightly |
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7. Isovolumetric relaxation phase |
-Diastole begins -LV pressure drops below aortic ---> valve closes (S2) -Volume in LV = LVESV -Aortic pressure fluctuates - Dicrotic notch (windkessel effect)
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"V" wave |
-Pressure in Left atrium -Upslope = Filling -Downslope = open of mitral valve |
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Venous pressure waves |
-Jugular pressure reflects that in right atrium |
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"A" wave |
-atrium contraction |
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"C" wave |
-Peak caused by AV valve bulging into right atrium because of ventricular contraction |
