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What part of the ECG tracing represents the time from the start of the atrial activity to the start of ventricular activity?
QT interval
What term is used to describe the horizontal part of a tracing on an ECG and what does this line indicate?
The horizontal part of a tracing on an ECG is called the baseline. It represents the period when the heart is not actively depolarizing or repolarizing, showing the electrical activity at rest.
Possible causes of a poor ECG tracing?
Causes for poor ECG tracing can be from the patient moving or interferences from electrical appliances in the room: cell phones, a lamp plug in etc
Which of the following results in extraneous marks on the ECG tracing?
Paperclips
Will a 60 cycle appliances interfere with a ECG tracing?
yes
What is the significance of the RR interval in ECG readings?
The RR interval in ECG readings represents the time between two consecutive heartbeats. It is significant because it can provide information about the heart's electrical activity, heart rate variability, and overall cardiac health. Abnormalities in the RR interval can indicate potential heart conditions or issues with the heart's conduction system.
What is R-R interval in an ECG?
the time between the two R waves in ECG
Why does RR interval of ECG vary during normal respiration?
The RR interval of ECG vary during normal respiration because of the sinus arrhythmia.
What does the ecg wave tracing represent?
The ECG wave tracing represents the electrical activity of the heart as it beats. It shows the depolarization and repolarization of the heart muscle, which corresponds to specific events in the cardiac cycle. The different waves and intervals on the ECG tracing provide information about the heart's rhythm, rate, and potential abnormalities.
In a normal ECG tracing?
the repolarization of the atria is hidden by the QRS wave
Does the atrial rate equal the ventricular rate in the ECG tracing?
yes
How do you measure an S-P interval?
To measure the S-P interval, you would first identify the onset of the S wave and the onset of the subsequent P wave on an electrocardiogram (ECG) tracing. Then, you would determine the time interval between these two points, typically using calipers or measuring tools available on ECG machines. The S-P interval represents the time it takes for electrical stimuli to travel from the AV node to the Purkinje fibers in the heart.
