Observe that the PR interval is variable. The location of the infarct determines what treatment should be used to improve oxygenation to the heart to minimize damage. Free online medical terminology flash cards. This is measured from the onset of the P wave to the onset of the QRS complex regardless if the initial wave is a Q or R wave. This is termed sinus arrhythmia.
Electrocardiogram and rhythm strip interpretation by final year medical students.
Enter your email address below and hit "Submit" to receive free email updates and nursing tips. Mark out several consecutive R-R intervals on a piece of paper, then move them along the rhythm strip to check if the subsequent intervals are the same. Confirm the date and time the ECG was performed. These waves represent atrial depolarization. But for moment-to-moment monitoring, we use the 5-lead set-up. Do not copy this site, articles, images, or its contents without permission.
These are called the limb leads. We also do 12 leads as needed if a patient has worsening chest pain and is waiting for a heart cathetertization or similar emergent situations. Take the Heart Disease Quiz! The heart is a two stage electrical pump and the heart's electrical activity can be measured by electrodes placed on the skin. It usually requires the presence of an accessory pathway. Telling Your Patients' Stories. Waveform components can be measured using the electronic calipers.