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16 Cards in this Set
- Front
- Back
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electrical events recorded from an ECG consists of 3 waves
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P wave - QRS complex - T wave
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P wave is ____ ____
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atrial depolarization
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no P wave =
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SA node dysfunction
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↑P waves =
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2nd degree heart block
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QRS complex is ____ ____
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ventricular depolarization
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↑P waves =
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2nd degree heart block
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T wave is ____ ____
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ventricular repolarization
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2 heart sounds
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lub-dub - pause
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lub dub is ____ valves closing for ____ ____
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AV - ventricular systole
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"dub" =
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semilunar valves closing
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pause is ____ period & last ____
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quiescent - (0.4 sec)
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during pause, ____ & ____ are in diastole simultaneously
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ventricles - atria
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cardiac out put is the amount of blood pumped out by each ____ in 1 minute
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ventricle
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if cardiac output is more than 14 liters per min., ____ stimulation is needed
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sympathetic
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starling's law of heart states the greater the volume of blood returned to the heart by the veins, the greater the …
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volume of blood the heart will pump
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muscle cells stretched to optimum length will contract with …
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greater force
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