Telemetry questions and answers graded A+ 2023/2024

TelemetryIsoelectric What is the depolarized status of the ventricles called? 5 mm What is the measurement between two dark lines on a ECG strip? 1 second of time How much time is 5 LARGE boxes on an ECG strip? 0.20 seconds How much time is 1 LARGE box on an ECG strip? 0.04 seconds (= 1 mm) How much time is 1 small box on an ECG strip? P waves To determine atrial rate, you would measure WHAT between two adjacent complexes using a caliper? QRS complexes To determine ventricular rate, you would measure WHAT between two adjacent complexes using a caliper? pacemaker spikes To determine pacemaker rate, you would measure WHAT between two adjacent complexes using a caliper? 6 seconds, using a 6 second strip What length of time is needed when analyzing the heart rate of an irregular rhythm? 15 large boxes or 3 seconds On most commonly produced ECG paper, what is the measurement and time between large marks printed above the graph strip? Using the 6 second strip method, count the number of complexes in 6 seconds and multiply by 10 to get BPM. What is the easiest way to determine heart rate of a dysrhythmic ECG? < 0.11 seconds (not quite 3 small boxes) What is the normal length of a P wave? 0.12 - 0.20 seconds (3 - 5 small boxes) What is the normal length of a PR interval? < 0.10 seconds (<2.5 small boxes) What is the normal length of a QRS interval (from baseline to baseline)? Definitely a concern, could be an indication of ischemic heart disease, pericarditis, or other conditions. Is a shift up or down from the baseline in the QT segment normal or a concern? Use the pre-calculated chart or the specific formula for .determining the corrected QTC How do you determine the corrected QT interval to determine if a given strip is normal or abnormal? Term for number of small boxes (0.04 seconds) between two complexes. In a corrected QT chart, what is the "Cycle Time" A.) What is the atrial rhythm? (Look for P waves) B.) What is the ventricular rhythm? (Look at the QRS complexes. C.) Is AV conduction normal? (What is the relationship between the P waves and the QRS complexes?) D.) Are there any unsual complexes? (Are there early complexes, late complexes, or complexes of unusual contour? E.) Is the rhythm dangerous? What is are the 5 major questions to ask when determining diagnosis of an ECG? They are occurring at the same time as a QRS complex or T wave, and being much smaller are hidden. Why are P waves sometimes not seen on a ECG strip?