What is the R and R interval?
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Amelia Clark
Studied at University of Oxford, Lives in Oxford, UK
As a medical professional with expertise in cardiology, I can explain the concept of the R and R intervals in an ECG (electrocardiogram) reading.
The R interval refers to the time between two successive R waves, which are the first and most prominent deflections in a normal QRS complex on an ECG. The R wave represents the depolarization of the ventricles, which is the electrical signal that causes the heart muscle to contract and pump blood.
The R-R interval, on the other hand, is the time between two successive R-R intervals. It is essentially the same as the R interval but is often used to describe the regularity of the heartbeat. The R-R interval is a measure of the heart rate; a shorter R-R interval indicates a higher heart rate, and a longer one indicates a lower heart rate.
In a normal ECG, the R-R interval is consistent, reflecting a regular heartbeat. Variations in the R-R interval can indicate various heart conditions, such as arrhythmias.
To summarize:
- R interval: Time between two R waves.
- R-R interval: Time between two successive R-R intervals, reflecting the heart rate.
Studied at University of Cambridge, Lives in Cambridge, UK
Other terms used include: "cycle length variability", "RR variability" (where R is a point corresponding to the peak of the QRS complex of the ECG wave; and RR is the interval between successive Rs), and "heart period variability".
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Amelia Brown
QuesHub.com delivers expert answers and knowledge to you.
Other terms used include: "cycle length variability", "RR variability" (where R is a point corresponding to the peak of the QRS complex of the ECG wave; and RR is the interval between successive Rs), and "heart period variability".
