Forgot your password? Or sign in with one of these services. BennyRsMom has 5 years experience and specializes in critical care.
Course Exam. This is one of the most important sections of this course. Interpretation of the ECG must be done in a logical sequence in order to best serve the patient.
The PR interval represents atrioventricular AV node conduction time. The AV node is part of the electrical conduction system of the heartand is known as the gatekeeper of the electrical system. The PR interval tends to be longer in older adults, and shortens when the heart rate increases.
For many nursing students and new nurses EKG interpretation can be intimidating, to say the least. I remember my first day as a nurse in the ICU. To say that I was overwhelmed is a pretty big understatement. In fact you can interpret ANY heart rhythm in just 5 simple steps.
An electrocardiogram also called an ECG or EKG is a test that records the timing and strength of the electrical signals that make the heart beat. By looking at an ECG, a doctor can gain insights about your heart rhythm and look for irregularities. The ECG app records an electrocardiogram which represents the electrical pulses that make your heart beat.
Electrocardiography is the process of producing an electrocardiogram ECG or EKG [a]a recording — a graph of voltage versus time — of the electrical activity of the heart  using electrodes placed on the skin. These electrodes detect the small electrical changes that are a consequence of cardiac muscle depolarization followed by repolarization during each cardiac cycle heartbeat. Changes in the normal ECG pattern occur in numerous cardiac abnormalities, including cardiac rhythm disturbances such as atrial fibrillation and ventricular tachycardiainadequate coronary artery blood flow such as myocardial ischemia and myocardial infarctionand electrolyte disturbances such as hypokalemia and hyperkalemia.
Print version of Knowledge bytes used in this lesson. Close the window to return to the lesson after printing. The rate of paper i.
It occurs when either the sinoatrial node fails to initiate an electrical impulse or the generated impulse is blocked prior to exit and the atria do not depolarize. A "gap" occurs where a P-QRS-T sequence would normally occur and only the isoelectric line is visible. This unexpected break in the rhythm is identified during the first step when rhythm regularity is determined. The length of the pause is calculated in seconds by measuring the time between the last R wave before the pause to the first R wave after the pause.
In the previous article, we discussed how to measure the PR interval and how to count a heart rate on an EKG strip using the 6 second ruleso now we are going to discuss how to measure a QRS complex. The QRS complex tends to be wide in ventricular tachycardia v-tach and very narrow in sinus tachycardia. In this article, I am going to explain how to easily measure the QRS complex.
Confirm the name and date of birth of the patient matches the details on the ECG. Hint: If there are obviously P-waves present, check the ventricular rate and the atrial rate. The rates will be the same if there is AV conduction. 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.