Voltage—the electrical signals of the heart—is measured along the vertical axis; time is measured along the horizontal axis in squares. There are large squares that are divided into smaller squares.  Small squares are 1 mm across and represent 0.04 seconds. The large squares measure 5 mm across and represent 0.2 seconds. 10 mm in height is equal to 1mV in voltage. Interpreting these values will help you determine if the heartbeat is irregular, or too fast or too slow. The Q wave is the downward or negative dip right before the large spike. The R wave is right after that, and is usually the largest spike on the readout. Following that is the S wave, which is the dip down below the baseline again. Label all of these parts on the printout.  Look at the peaks on the printout. You will need to look at the whole strip to check for an irregular heartbeat. This is a pattern called normal sinus rhythm, and it's the basic EKG of a healthy heart. Many people's EKG may vary slightly from this baseline, though, while still being completely healthy. Find the P-waves on your EKG. P-waves are the smaller spikes right before the larger spike (the R wave). They should be at the approximately same duration, direction, and shape through the entire EKG.  If they are not present, see if there any movement to the line at all, like a flutter, sawtooth lines, or a flat line. P-might just be a small rise, or bump, on the graph. They will not be as sharp or as high as the QRS complex.
افهم طريقة تقسيم ورقة رسم القلب المطبوعة. اعثر على (the QRS complex) وسجلها في مذكرة. حدد الموجة P على ورقة رسم القلب.