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.
The nurse obtains a monitor strip on a patient admitted to the coronary care unit with a myocardial infarction and makes the following analysis: P wave not apparent; ventricular rate 162, R-R interval regular; PR interval not measurable; and QRS complex wide and distorted, QRS duration 0.18 second.