How do you measure mean LA-Pressure? I mean in normal Conditions it is easy. but how you do it, wenn you have a large V-Wave? let us say a is 10 mmhg and V is 50 mmhg.
Mean LA pressure is the integral of all the peaks and dips of the LA pressure. The best measurement of mean LA pressure is the computerized one: for example, at minutes 43:14 and 47:02, you see that the software displays a "mean line" (the undulating line). This is similar to how we measure mean arterial pressure from an art line. If you want to make a quick mental calculation, an approximation of mean LA pressure in a patient with prominent V would be (2 Y+ V)/3. This is not very accurate, because you have to account for areas under curve and durations of waves, not just height. In bradycardia, more time is spent in diastole and mean LA is closer to Y than in that quick approximation.
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How do you measure mean LA-Pressure? I mean in normal Conditions it is easy. but how you do it, wenn you have a large V-Wave? let us say a is 10 mmhg and V is 50 mmhg.
Mean LA pressure is the integral of all the peaks and dips of the LA pressure. The best measurement of mean LA pressure is the computerized one: for example, at minutes 43:14 and 47:02, you see that the software displays a "mean line" (the undulating line). This is similar to how we measure mean arterial pressure from an art line. If you want to make a quick mental calculation, an approximation of mean LA pressure in a patient with prominent V would be (2 Y+ V)/3. This is not very accurate, because you have to account for areas under curve and durations of waves, not just height. In bradycardia, more time is spent in diastole and mean LA is closer to Y than in that quick approximation.