Can what I eat help prevent future kidney stones? You may be able to prevent future kidney stones by making changes in how much sodium, animal protein, calcium, or oxalate you consume. A dietitian who specializes in kidney stone prevention can help you plan meals. You can make changes to what you eat based on the type of kidney stone you had.
Here are some simple steps on how to measure the PR interval: 1  Find the P-wave on the EKG strip. 2  Determine where the PR interval is, and to do this you start measuring at the beginning of the p-wave until the beginning of the QRS complex. 3  Count the SMALL boxes between there measurements.  Remember each box represents 0.04 seconds.
How Electrocardiograms Work - EKG Strips. To briefly summarize the components of a normal EKG strip, it consist of components which indicate electrical events during one heart beat. These waveforms are labeled P, Q, R, S, T and U. P wave is the first short upward movement of the ECG tracing.